21020210020130 has 32 divisors (see below), whose sum is σ = 37867145762160. Its totient is φ = 8401248875520.

The previous prime is 21020210020129. The next prime is 21020210020151. The reversal of 21020210020130 is 3102001202012.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 12613173559009 + 8407036461121 = 3551503^2 + 2899489^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80416286 + ... + 80677254.

Almost surely, 2^{21020210020130} is an apocalyptic number.

21020210020130 is a deficient number, since it is larger than the sum of its proper divisors (16846935742030).

21020210020130 is a wasteful number, since it uses less digits than its factorization.

21020210020130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267494.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21020210020130 its reverse (3102001202012), we get a palindrome (24122211222142).

The spelling of 21020210020130 in words is "twenty-one trillion, twenty billion, two hundred ten million, twenty thousand, one hundred thirty".