21020113133310 has 32 divisors (see below), whose sum is σ = 50610484634112. Its totient is φ = 5587339822880.

The previous prime is 21020113133209. The next prime is 21020113133317. The reversal of 21020113133310 is 1333131102012.

It is a happy number.

It is a super-2 number, since 2×21020113133310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020113133317) 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, 1126470474 + ... + 1126489133.

It is an arithmetic number, because the mean of its divisors is an integer number (1581577644816).

Almost surely, 2^{21020113133310} is an apocalyptic number.

21020113133310 is an abundant number, since it is smaller than the sum of its proper divisors (29590371500802).

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

21020113133310 is a wasteful number, since it uses less digits than its factorization.

21020113133310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252959928.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21020113133310 its reverse (1333131102012), we get a palindrome (22353244235322).

The spelling of 21020113133310 in words is "twenty-one trillion, twenty billion, one hundred thirteen million, one hundred thirty-three thousand, three hundred ten".