21010022122 has 16 divisors (see below), whose sum is σ = 33291792000. Its totient is φ = 9916693920.

The previous prime is 21010022063. The next prime is 21010022123. The reversal of 21010022122 is 22122001012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21010022123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 973122 + ... + 994477.

It is an arithmetic number, because the mean of its divisors is an integer number (2080737000).

Almost surely, 2^21010022122 is an apocalyptic number.

21010022122 is a deficient number, since it is larger than the sum of its proper divisors (12281769878).

21010022122 is a wasteful number, since it uses less digits than its factorization.

21010022122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967901.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21010022122 its reverse (22122001012), we get a palindrome (43132023134).

The spelling of 21010022122 in words is "twenty-one billion, ten million, twenty-two thousand, one hundred twenty-two".