212131023222 has 16 divisors (see below), whose sum is σ = 433288899072. Its totient is φ = 69205865640.

The previous prime is 212131023193. The next prime is 212131023239. The reversal of 212131023222 is 222320131212.

It is a super-2 number, since 2×212131023222² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376118554 + ... + 376119117.

It is an arithmetic number, because the mean of its divisors is an integer number (27080556192).

Almost surely, 2^212131023222 is an apocalyptic number.

212131023222 is an abundant number, since it is smaller than the sum of its proper divisors (221157875850).

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

212131023222 is a wasteful number, since it uses less digits than its factorization.

212131023222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752237723.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 212131023222 its reverse (222320131212), we get a palindrome (434451154434).

The spelling of 212131023222 in words is "two hundred twelve billion, one hundred thirty-one million, twenty-three thousand, two hundred twenty-two".