20111211012102 has 24 divisors (see below), whose sum is σ = 46789348069656. Its totient is φ = 5746060289088.

The previous prime is 20111211012049. The next prime is 20111211012103. The reversal of 20111211012102 is 20121011211102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111211012103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34202739523 + ... + 34202740110.

It is an arithmetic number, because the mean of its divisors is an integer number (1949556169569).

Almost surely, 2^{20111211012102} is an apocalyptic number.

20111211012102 is an abundant number, since it is smaller than the sum of its proper divisors (26678137057554).

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

20111211012102 is a wasteful number, since it uses less digits than its factorization.

20111211012102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68405479652 (or 68405479645 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20111211012102 its reverse (20121011211102), we get a palindrome (40232222223204).

The spelling of 20111211012102 in words is "twenty trillion, one hundred eleven billion, two hundred eleven million, twelve thousand, one hundred two".