213122131222 has 32 divisors (see below), whose sum is σ = 429224995584. Its totient is φ = 76647319200.

The previous prime is 213122131141. The next prime is 213122131223. The reversal of 213122131222 is 222131221312.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 213122131193 and 213122131202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213122131223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53225304 + ... + 53229307.

It is an arithmetic number, because the mean of its divisors is an integer number (13413281112).

Almost surely, 2^213122131222 is an apocalyptic number.

213122131222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

213122131222 is an abundant number, since it is smaller than the sum of its proper divisors (216102864362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213122131222 is a wasteful number, since it uses less digits than its factorization.

213122131222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106454644.

The product of its digits is 576, while the sum is 22.

Adding to 213122131222 its reverse (222131221312), we get a palindrome (435253352534).

It can be divided in two parts, 2131221312 and 22, that multiplied together give a palindrome (46886868864).

The spelling of 213122131222 in words is "two hundred thirteen billion, one hundred twenty-two million, one hundred thirty-one thousand, two hundred twenty-two".