20011021011102 has 128 divisors (see below), whose sum is σ = 46851423072768. Its totient is φ = 5630759424000.

The previous prime is 20011021011043. The next prime is 20011021011127. The reversal of 20011021011102 is 20111012011002.

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, 31758138 + ... + 32382114.

It is an arithmetic number, because the mean of its divisors is an integer number (366026742756).

Almost surely, 2^{20011021011102} is an apocalyptic number.

20011021011102 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 20011021011102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23425711536384).

20011021011102 is an abundant number, since it is smaller than the sum of its proper divisors (26840402061666).

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

20011021011102 is a wasteful number, since it uses less digits than its factorization.

20011021011102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624394.

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

Adding to 20011021011102 its reverse (20111012011002), we get a palindrome (40122033022104).

It can be divided in two parts, 200110 and 21011102, that added together give a palindrome (21211212).

The spelling of 20011021011102 in words is "twenty trillion, eleven billion, twenty-one million, eleven thousand, one hundred two".