21121011100010 has 32 divisors (see below), whose sum is σ = 39308221527552. Its totient is φ = 8162537711040.

The previous prime is 21121011099943. The next prime is 21121011100061. The reversal of 21121011100010 is 1000111012112.

It is a junction number, because it is equal to n+sod(n) for n = 21121011099964 and 21121011100000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55382804 + ... + 55762863.

It is an arithmetic number, because the mean of its divisors is an integer number (1228381922736).

Almost surely, 2^{21121011100010} is an apocalyptic number.

21121011100010 is a deficient number, since it is larger than the sum of its proper divisors (18187210427542).

21121011100010 is a wasteful number, since it uses less digits than its factorization.

21121011100010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111146318.

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

Adding to 21121011100010 its reverse (1000111012112), we get a palindrome (22121122112122).

The spelling of 21121011100010 in words is "twenty-one trillion, one hundred twenty-one billion, eleven million, one hundred thousand, ten".