212512122 has 24 divisors (see below), whose sum is σ = 461672640. Its totient is φ = 70648200.

The previous prime is 212512109. The next prime is 212512123. The reversal of 212512122 is 221215212.

It is a super-2 number, since 2×212512122² = 90322803993885768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212512095 and 212512104.

It is not an unprimeable number, because it can be changed into a prime (212512123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8754 + ... + 22397.

It is an arithmetic number, because the mean of its divisors is an integer number (19236360).

Almost surely, 2^212512122 is an apocalyptic number.

212512122 is an abundant number, since it is smaller than the sum of its proper divisors (249160518).

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

212512122 is a wasteful number, since it uses less digits than its factorization.

212512122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31538 (or 31535 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 212512122 is about 14577.7955123537. The cubic root of 212512122 is about 596.7529427309.

Adding to 212512122 its reverse (221215212), we get a palindrome (433727334).

The spelling of 212512122 in words is "two hundred twelve million, five hundred twelve thousand, one hundred twenty-two".