21100111210010 has 96 divisors (see below), whose sum is σ = 45608698874880. Its totient is φ = 7000581772800.

The previous prime is 21100111210007. The next prime is 21100111210067. The reversal of 21100111210010 is 1001211100112.

It is a junction number, because it is equal to n+sod(n) for n = 21100111209973 and 21100111210000.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 524323490 + ... + 524363730.

It is an arithmetic number, because the mean of its divisors is an integer number (475090613280).

Almost surely, 2^{21100111210010} is an apocalyptic number.

21100111210010 is an abundant number, since it is smaller than the sum of its proper divisors (24508587664870).

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

21100111210010 is a wasteful number, since it uses less digits than its factorization.

21100111210010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74812 (or 74805 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21100111210010 its reverse (1001211100112), we get a palindrome (22101322310122).

The spelling of 21100111210010 in words is "twenty-one trillion, one hundred billion, one hundred eleven million, two hundred ten thousand, ten".