21130034300402 has 4 divisors (see below), whose sum is σ = 31695051450606. Its totient is φ = 10565017150200.

The previous prime is 21130034300387. The next prime is 21130034300447. The reversal of 21130034300402 is 20400343003112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17838636463561 + 3291397836841 = 4223581^2 + 1814221^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5282508575099 + ... + 5282508575102.

Almost surely, 2^{21130034300402} is an apocalyptic number.

21130034300402 is a deficient number, since it is larger than the sum of its proper divisors (10565017150204).

21130034300402 is a wasteful number, since it uses less digits than its factorization.

21130034300402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10565017150203.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21130034300402 its reverse (20400343003112), we get a palindrome (41530377303514).

The spelling of 21130034300402 in words is "twenty-one trillion, one hundred thirty billion, thirty-four million, three hundred thousand, four hundred two".