21130021131010 has 96 divisors (see below), whose sum is σ = 42401188183536. Its totient is φ = 7574907648000.

The previous prime is 21130021130989. The next prime is 21130021131017. The reversal of 21130021131010 is 1013112003112.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4874279281729 + 16255741849281 = 2207777^2 + 4031841^2 .

It is not an unprimeable number, because it can be changed into a prime (21130021131017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28103902 + ... + 28845958.

Almost surely, 2^{21130021131010} is an apocalyptic number.

21130021131010 is an abundant number, since it is smaller than the sum of its proper divisors (21271167052526).

21130021131010 is a wasteful number, since it uses less digits than its factorization.

21130021131010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742420 (or 742409 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21130021131010 its reverse (1013112003112), we get a palindrome (22143133134122).

The spelling of 21130021131010 in words is "twenty-one trillion, one hundred thirty billion, twenty-one million, one hundred thirty-one thousand, ten".