21020003122 has 16 divisors (see below), whose sum is σ = 32002955712. Its totient is φ = 10352618640.

The previous prime is 21020003113. The next prime is 21020003159. The reversal of 21020003122 is 22130002012.

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, 92353 + ... + 224875.

It is an arithmetic number, because the mean of its divisors is an integer number (2000184732).

Almost surely, 2^21020003122 is an apocalyptic number.

21020003122 is a deficient number, since it is larger than the sum of its proper divisors (10982952590).

21020003122 is a wasteful number, since it uses less digits than its factorization.

21020003122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133713.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21020003122 its reverse (22130002012), we get a palindrome (43150005134).

The spelling of 21020003122 in words is "twenty-one billion, twenty million, three thousand, one hundred twenty-two".