21130224202 has 16 divisors (see below), whose sum is σ = 32543432712. Its totient is φ = 10283604480.

The previous prime is 21130224127. The next prime is 21130224253. The reversal of 21130224202 is 20242203112.

It can be written as a sum of positive squares in 4 ways, for example, as 15587272801 + 5542951401 = 124849^2 + 74451^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21130224202.

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, 262053 + ... + 333064.

Almost surely, 2^21130224202 is an apocalyptic number.

21130224202 is a deficient number, since it is larger than the sum of its proper divisors (11413208510).

21130224202 is a wasteful number, since it uses less digits than its factorization.

21130224202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595593.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21130224202 its reverse (20242203112), we get a palindrome (41372427314).

The spelling of 21130224202 in words is "twenty-one billion, one hundred thirty million, two hundred twenty-four thousand, two hundred two".