21025531022 has 8 divisors (see below), whose sum is σ = 31570779672. Its totient is φ = 10501937800.

The previous prime is 21025531013. The next prime is 21025531027. The reversal of 21025531022 is 22013552012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21025531027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5411429 + ... + 5415312.

It is an arithmetic number, because the mean of its divisors is an integer number (3946347459).

Almost surely, 2^21025531022 is an apocalyptic number.

21025531022 is a deficient number, since it is larger than the sum of its proper divisors (10545248650).

21025531022 is a wasteful number, since it uses less digits than its factorization.

21025531022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10827714.

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 21025531022 in words is "twenty-one billion, twenty-five million, five hundred thirty-one thousand, twenty-two".