213112322031 has 48 divisors (see below), whose sum is σ = 347254822400. Its totient is φ = 113855500800.

The previous prime is 213112321993. The next prime is 213112322039. The reversal of 213112322031 is 130223211312.

It is not a de Polignac number, because 213112322031 - 2⁹ = 213112321519 is a prime.

It is a super-2 number, since 2×213112322031² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213112321989 and 213112322007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213112322039) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 800145 + ... + 1032693.

Almost surely, 2^213112322031 is an apocalyptic number.

213112322031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

213112322031 is a deficient number, since it is larger than the sum of its proper divisors (134142500369).

213112322031 is a wasteful number, since it uses less digits than its factorization.

213112322031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232744 (or 232727 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213112322031 its reverse (130223211312), we get a palindrome (343335533343).

The spelling of 213112322031 in words is "two hundred thirteen billion, one hundred twelve million, three hundred twenty-two thousand, thirty-one".