20111220000102 has 128 divisors (see below), whose sum is σ = 51227063746560. Its totient is φ = 5111749319040.

The previous prime is 20111220000083. The next prime is 20111220000121. The reversal of 20111220000102 is 20100002211102.

It is an interprime number because it is at equal distance from previous prime (20111220000083) and next prime (20111220000121).

It is a super-2 number, since 2×20111220000102² (a number of 27 digits) contains 22 as substring.

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, 8305899 + ... + 10450377.

It is an arithmetic number, because the mean of its divisors is an integer number (400211435520).

Almost surely, 2^{20111220000102} is an apocalyptic number.

20111220000102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20111220000102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25613531873280).

20111220000102 is an abundant number, since it is smaller than the sum of its proper divisors (31115843746458).

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

20111220000102 is a wasteful number, since it uses less digits than its factorization.

20111220000102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144938.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20111220000102 its reverse (20100002211102), we get a palindrome (40211222211204).

The spelling of 20111220000102 in words is "twenty trillion, one hundred eleven billion, two hundred twenty million, one hundred two", and thus it is an aban number.