212222212122 has 16 divisors (see below), whose sum is σ = 426643620480. Its totient is φ = 70374204672.

The previous prime is 212222212073. The next prime is 212222212127. The reversal of 212222212122 is 221212222212.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (212222212127) 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, 91631922 + ... + 91634237.

It is an arithmetic number, because the mean of its divisors is an integer number (26665226280).

Almost surely, 2^212222212122 is an apocalyptic number.

212222212122 is an abundant number, since it is smaller than the sum of its proper divisors (214421408358).

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

212222212122 is a wasteful number, since it uses less digits than its factorization.

212222212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183266357.

The product of its digits is 512, while the sum is 21.

Adding to 212222212122 its reverse (221212222212), we get a palindrome (433434434334).

The spelling of 212222212122 in words is "two hundred twelve billion, two hundred twenty-two million, two hundred twelve thousand, one hundred twenty-two".