21010102121104 has 20 divisors (see below), whose sum is σ = 40886399178864. Its totient is φ = 10458773300768.

The previous prime is 21010102121059. The next prime is 21010102121123. The reversal of 21010102121104 is 40112120101012.

It is a super-2 number, since 2×21010102121104² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2892356242 + ... + 2892363505.

Almost surely, 2^{21010102121104} is an apocalyptic number.

It is an amenable number.

21010102121104 is a deficient number, since it is larger than the sum of its proper divisors (19876297057760).

21010102121104 is a wasteful number, since it uses less digits than its factorization.

21010102121104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5784719982 (or 5784719976 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21010102121104 its reverse (40112120101012), we get a palindrome (61122222222116).

The spelling of 21010102121104 in words is "twenty-one trillion, ten billion, one hundred two million, one hundred twenty-one thousand, one hundred four".