21111010102112 has 96 divisors (see below), whose sum is σ = 50001190848000. Its totient is φ = 8571142407168.

The previous prime is 21111010102069. The next prime is 21111010102123. The reversal of 21111010102112 is 21120101011112.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265845389 + ... + 265924787.

It is an arithmetic number, because the mean of its divisors is an integer number (520845738000).

Almost surely, 2^{21111010102112} is an apocalyptic number.

It is an amenable number.

21111010102112 is an abundant number, since it is smaller than the sum of its proper divisors (28890180745888).

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

21111010102112 is a wasteful number, since it uses less digits than its factorization.

21111010102112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141908 (or 141900 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21111010102112 its reverse (21120101011112), we get a palindrome (42231111113224).

The spelling of 21111010102112 in words is "twenty-one trillion, one hundred eleven billion, ten million, one hundred two thousand, one hundred twelve".