213020123031013 has 4 divisors (see below), whose sum is σ = 213020887236300. Its totient is φ = 213019358825728.

The previous prime is 213020123030947. The next prime is 213020123031017. The reversal of 213020123031013 is 310130321020312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 153548603109729 + 59471519921284 = 12391473^2 + 7711778^2 .

It is a cyclic number.

It is not a de Polignac number, because 213020123031013 - 2²¹ = 213020120933861 is a prime.

It is a super-2 number, since 2×213020123031013² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213020123031017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381684370 + ... + 382242067.

It is an arithmetic number, because the mean of its divisors is an integer number (53255221809075).

Almost surely, 2^{213020123031013} is an apocalyptic number.

It is an amenable number.

213020123031013 is a deficient number, since it is larger than the sum of its proper divisors (764205287).

213020123031013 is an equidigital number, since it uses as much as digits as its factorization.

213020123031013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764205286.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 213020123031013 its reverse (310130321020312), we get a palindrome (523150444051325).

The spelling of 213020123031013 in words is "two hundred thirteen trillion, twenty billion, one hundred twenty-three million, thirty-one thousand, thirteen".