21023311031313 has 8 divisors (see below), whose sum is σ = 28081406478528. Its totient is φ = 13990378135824.

The previous prime is 21023311031309. The next prime is 21023311031341. The reversal of 21023311031313 is 31313011332012.

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

It is not a de Polignac number, because 21023311031313 - 2² = 21023311031309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21023311033313) 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, 6290635981 + ... + 6290639322.

It is an arithmetic number, because the mean of its divisors is an integer number (3510175809816).

Almost surely, 2^{21023311031313} is an apocalyptic number.

It is an amenable number.

21023311031313 is a deficient number, since it is larger than the sum of its proper divisors (7058095447215).

21023311031313 is a wasteful number, since it uses less digits than its factorization.

21023311031313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12581275863.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 21023311031313 its reverse (31313011332012), we get a palindrome (52336322363325).

The spelling of 21023311031313 in words is "twenty-one trillion, twenty-three billion, three hundred eleven million, thirty-one thousand, three hundred thirteen".