21020131311000 has 64 divisors (see below), whose sum is σ = 65582809699680. Its totient is φ = 5605368348800.

The previous prime is 21020131310989. The next prime is 21020131311013. The reversal of 21020131311000 is 11313102012.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3503352219 + ... + 3503358218.

Almost surely, 2^{21020131311000} is an apocalyptic number.

21020131311000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020131311000 is an abundant number, since it is smaller than the sum of its proper divisors (44562678388680).

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

21020131311000 is a wasteful number, since it uses less digits than its factorization.

21020131311000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7006710461 (or 7006710447 counting only the distinct ones).

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

Adding to 21020131311000 its reverse (11313102012), we get a palindrome (21031444413012).

The spelling of 21020131311000 in words is "twenty-one trillion, twenty billion, one hundred thirty-one million, three hundred eleven thousand".