213021203031 has 24 divisors (see below), whose sum is σ = 378704362400. Its totient is φ = 112362831936.

The previous prime is 213021203023. The next prime is 213021203039. The reversal of 213021203031 is 130302120312.

213021203031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (213021203023) and next prime (213021203039).

It is not a de Polignac number, because 213021203031 - 2³ = 213021203023 is a prime.

It is a super-2 number, since 2×213021203031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213021202995 and 213021203013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213021203039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130048756 + ... + 130050393.

Almost surely, 2^213021203031 is an apocalyptic number.

213021203031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

213021203031 is a deficient number, since it is larger than the sum of its proper divisors (165683159369).

213021203031 is a wasteful number, since it uses less digits than its factorization.

213021203031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260099175 (or 260099172 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 213021203031 its reverse (130302120312), we get a palindrome (343323323343).

The spelling of 213021203031 in words is "two hundred thirteen billion, twenty-one million, two hundred three thousand, thirty-one".