213122011031 has 8 divisors (see below), whose sum is σ = 229112129280. Its totient is φ = 197609209848.

The previous prime is 213122011009. The next prime is 213122011033. The reversal of 213122011031 is 130110221312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213122011031 - 2⁶ = 213122010967 is a prime.

It is a super-2 number, since 2×213122011031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213122011033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119328341 + ... + 119330126.

It is an arithmetic number, because the mean of its divisors is an integer number (28639016160).

Almost surely, 2^213122011031 is an apocalyptic number.

213122011031 is a deficient number, since it is larger than the sum of its proper divisors (15990118249).

213122011031 is a wasteful number, since it uses less digits than its factorization.

213122011031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238658533.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 213122011031 its reverse (130110221312), we get a palindrome (343232232343).

The spelling of 213122011031 in words is "two hundred thirteen billion, one hundred twenty-two million, eleven thousand, thirty-one".