21221127568374 has 32 divisors (see below), whose sum is σ = 42450901839360. Its totient is φ = 7072268260800.

The previous prime is 21221127568307. The next prime is 21221127568409. The reversal of 21221127568374 is 47386572112212.

It is a congruent number.

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, 1158918679 + ... + 1158936989.

It is an arithmetic number, because the mean of its divisors is an integer number (1326590682480).

Almost surely, 2^{21221127568374} is an apocalyptic number.

21221127568374 is an abundant number, since it is smaller than the sum of its proper divisors (21229774270986).

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

21221127568374 is a wasteful number, since it uses less digits than its factorization.

21221127568374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47116.

The product of its digits is 2257920, while the sum is 51.

The spelling of 21221127568374 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twenty-seven million, five hundred sixty-eight thousand, three hundred seventy-four".