21131031131333 has 8 divisors (see below), whose sum is σ = 22051446046656. Its totient is φ = 20210755752000.

The previous prime is 21131031131317. The next prime is 21131031131363. The reversal of 21131031131333 is 33313113013112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21131031131333 - 2⁴ = 21131031131317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131031131363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34574468 + ... + 35180333.

It is an arithmetic number, because the mean of its divisors is an integer number (2756430755832).

Almost surely, 2^{21131031131333} is an apocalyptic number.

21131031131333 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21131031131333 is a deficient number, since it is larger than the sum of its proper divisors (920414915323).

21131031131333 is a wasteful number, since it uses less digits than its factorization.

21131031131333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69767995.

The product of its (nonzero) digits is 1458, while the sum is 26.

Adding to 21131031131333 its reverse (33313113013112), we get a palindrome (54444144144445).

The spelling of 21131031131333 in words is "twenty-one trillion, one hundred thirty-one billion, thirty-one million, one hundred thirty-one thousand, three hundred thirty-three".