213321321031 has 32 divisors (see below), whose sum is σ = 276437629440. Its totient is φ = 159858002304.

The previous prime is 213321321029. The next prime is 213321321041. The reversal of 213321321031 is 130123123312.

It is not a de Polignac number, because 213321321031 - 2¹ = 213321321029 is a prime.

It is a super-2 number, since 2×213321321031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213321320993 and 213321321011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213321321041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8014461 + ... + 8041033.

It is an arithmetic number, because the mean of its divisors is an integer number (8638675920).

Almost surely, 2^213321321031 is an apocalyptic number.

213321321031 is a deficient number, since it is larger than the sum of its proper divisors (63116308409).

213321321031 is a wasteful number, since it uses less digits than its factorization.

213321321031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31255.

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

Adding to 213321321031 its reverse (130123123312), we get a palindrome (343444444343).

The spelling of 213321321031 in words is "two hundred thirteen billion, three hundred twenty-one million, three hundred twenty-one thousand, thirty-one".