20010102111100 has 72 divisors (see below), whose sum is σ = 44042032692000. Its totient is φ = 7889778355200.

The previous prime is 20010102111091. The next prime is 20010102111101. The reversal of 20010102111100 is 111120101002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010102111101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36713376 + ... + 37254424.

It is an arithmetic number, because the mean of its divisors is an integer number (611694898500).

Almost surely, 2^{20010102111100} is an apocalyptic number.

20010102111100 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 20010102111100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22021016346000).

20010102111100 is an abundant number, since it is smaller than the sum of its proper divisors (24031930580900).

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

20010102111100 is a wasteful number, since it uses less digits than its factorization.

20010102111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546343 (or 546336 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20010102111100 its reverse (111120101002), we get a palindrome (20121222212102).

The spelling of 20010102111100 in words is "twenty trillion, ten billion, one hundred two million, one hundred eleven thousand, one hundred".