21021011122012 has 24 divisors (see below), whose sum is σ = 40136744197872. Its totient is φ = 9553642444800.

The previous prime is 21021011121991. The next prime is 21021011122057. The reversal of 21021011122012 is 21022111012012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33753189 + ... + 34370332.

It is an arithmetic number, because the mean of its divisors is an integer number (1672364341578).

Almost surely, 2^{21021011122012} is an apocalyptic number.

21021011122012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21021011122012 is a deficient number, since it is larger than the sum of its proper divisors (19115733075860).

21021011122012 is a wasteful number, since it uses less digits than its factorization.

21021011122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68130549 (or 68130547 counting only the distinct ones).

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

Adding to 21021011122012 its reverse (21022111012012), we get a palindrome (42043122134024).

The spelling of 21021011122012 in words is "twenty-one trillion, twenty-one billion, eleven million, one hundred twenty-two thousand, twelve".