20111102101020 has 192 divisors, whose sum is σ = 64641409136640. Its totient is φ = 4576448028672.

The previous prime is 20111102101007. The next prime is 20111102101033. The reversal of 20111102101020 is 2010120111102.

20111102101020 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (20111102101007) and next prime (20111102101033).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20111102100987 and 20111102101005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 86288964 + ... + 86521716.

It is an arithmetic number, because the mean of its divisors is an integer number (336674005920).

Almost surely, 2^{20111102101020} is an apocalyptic number.

20111102101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20111102101020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32320704568320).

20111102101020 is an abundant number, since it is smaller than the sum of its proper divisors (44530307035620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111102101020 is a wasteful number, since it uses less digits than its factorization.

20111102101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233684 (or 233682 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111102101020 its reverse (2010120111102), we get a palindrome (22121222212122).

The spelling of 20111102101020 in words is "twenty trillion, one hundred eleven billion, one hundred two million, one hundred one thousand, twenty".