21023212110012 has 96 divisors (see below), whose sum is σ = 62293945190400. Its totient is φ = 6006347919936.

The previous prime is 21023212109981. The next prime is 21023212110029. The reversal of 21023212110012 is 21001121232012.

21023212110012 is a `hidden beast` number, since 210 + 2 + 321 + 21 + 100 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15601789 + ... + 16895627.

It is an arithmetic number, because the mean of its divisors is an integer number (648895262400).

Almost surely, 2^{21023212110012} is an apocalyptic number.

It is an amenable number.

21023212110012 is an abundant number, since it is smaller than the sum of its proper divisors (41270733080388).

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

21023212110012 is a wasteful number, since it uses less digits than its factorization.

21023212110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315352 (or 1315344 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21023212110012 its reverse (21001121232012), we get a palindrome (42024333342024).

The spelling of 21023212110012 in words is "twenty-one trillion, twenty-three billion, two hundred twelve million, one hundred ten thousand, twelve".