31042434120213 has 4 divisors (see below), whose sum is σ = 41389912160288. Its totient is φ = 20694956080140.

The previous prime is 31042434120193. The next prime is 31042434120233. The reversal of 31042434120213 is 31202143424013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (31042434120193) and next prime (31042434120233).

It is not a de Polignac number, because 31042434120213 - 2²² = 31042429925909 is a prime.

It is a super-2 number, since 2×31042434120213² (a number of 28 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 (31042434120233) 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, 5173739020033 + ... + 5173739020038.

It is an arithmetic number, because the mean of its divisors is an integer number (10347478040072).

Almost surely, 2^{31042434120213} is an apocalyptic number.

It is an amenable number.

31042434120213 is a deficient number, since it is larger than the sum of its proper divisors (10347478040075).

31042434120213 is a wasteful number, since it uses less digits than its factorization.

31042434120213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10347478040074.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 31042434120213 its reverse (31202143424013), we get a palindrome (62244577544226).

The spelling of 31042434120213 in words is "thirty-one trillion, forty-two billion, four hundred thirty-four million, one hundred twenty thousand, two hundred thirteen".