21122520003 has 96 divisors (see below), whose sum is σ = 35183296512. Its totient is φ = 12116563200.

The previous prime is 21122519981. The next prime is 21122520049. The reversal of 21122520003 is 30002522112.

21122520003 is a `hidden beast` number, since 21 + 122 + 520 + 0 + 0 + 3 = 666.

It is not a de Polignac number, because 21122520003 - 2⁶ = 21122519939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21122520053) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14358558 + ... + 14360028.

It is an arithmetic number, because the mean of its divisors is an integer number (366492672).

Almost surely, 2^21122520003 is an apocalyptic number.

21122520003 is a deficient number, since it is larger than the sum of its proper divisors (14060776509).

21122520003 is a wasteful number, since it uses less digits than its factorization.

21122520003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665 (or 1662 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The spelling of 21122520003 in words is "twenty-one billion, one hundred twenty-two million, five hundred twenty thousand, three".