21020001131310 has 32 divisors (see below), whose sum is σ = 50448553695360. Its totient is φ = 5605272415008.

The previous prime is 21020001131303. The next prime is 21020001131317. The reversal of 21020001131310 is 1313110002012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21020001131303) and next prime (21020001131317).

It is a super-2 number, since 2×21020001131310² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21020001131310.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020001131317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 999420 + ... + 6560399.

It is an arithmetic number, because the mean of its divisors is an integer number (1576517302980).

Almost surely, 2^{21020001131310} is an apocalyptic number.

21020001131310 is an abundant number, since it is smaller than the sum of its proper divisors (29428552564050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21020001131310 is a wasteful number, since it uses less digits than its factorization.

21020001131310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7652512.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21020001131310 its reverse (1313110002012), we get a palindrome (22333111133322).

The spelling of 21020001131310 in words is "twenty-one trillion, twenty billion, one million, one hundred thirty-one thousand, three hundred ten".