221112220022212 has 12 divisors (see below), whose sum is σ = 390496351874860. Its totient is φ = 109541833772256.

The previous prime is 221112220022189. The next prime is 221112220022231. The reversal of 221112220022212 is 212220022211122.

It can be written as a sum of positive squares in 2 ways, for example, as 65910107198016 + 155202112824196 = 8118504^2 + 12458014^2 .

It is a super-2 number, since 2×221112220022212² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253569059223 + ... + 253569060094.

Almost surely, 2^{221112220022212} is an apocalyptic number.

It is an amenable number.

221112220022212 is a deficient number, since it is larger than the sum of its proper divisors (169384131852648).

221112220022212 is a wasteful number, since it uses less digits than its factorization.

221112220022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507138119430 (or 507138119428 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 221112220022212 its reverse (212220022211122), we get a palindrome (433332242233334).

The spelling of 221112220022212 in words is "two hundred twenty-one trillion, one hundred twelve billion, two hundred twenty million, twenty-two thousand, two hundred twelve".