21021121122 has 16 divisors (see below), whose sum is σ = 42073940352. Its totient is φ = 7001757360.

The previous prime is 21021121117. The next prime is 21021121201. The reversal of 21021121122 is 22112112012.

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, 1312129 + ... + 1328052.

It is an arithmetic number, because the mean of its divisors is an integer number (2629621272).

Almost surely, 2^21021121122 is an apocalyptic number.

21021121122 is an abundant number, since it is smaller than the sum of its proper divisors (21052819230).

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

21021121122 is a wasteful number, since it uses less digits than its factorization.

21021121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641513.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21021121122 its reverse (22112112012), we get a palindrome (43133233134).

The spelling of 21021121122 in words is "twenty-one billion, twenty-one million, one hundred twenty-one thousand, one hundred twenty-two".