222121101212 has 24 divisors (see below), whose sum is σ = 392806629600. Its totient is φ = 109893381696.

The previous prime is 222121101199. The next prime is 222121101221. The reversal of 222121101212 is 212101121222.

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, 18887 + ... + 666782.

It is an arithmetic number, because the mean of its divisors is an integer number (16366942900).

Almost surely, 2^222121101212 is an apocalyptic number.

It is an amenable number.

222121101212 is a deficient number, since it is larger than the sum of its proper divisors (170685528388).

222121101212 is a wasteful number, since it uses less digits than its factorization.

222121101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686525 (or 686523 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 222121101212 its reverse (212101121222), we get a palindrome (434222222434).

The spelling of 222121101212 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred one thousand, two hundred twelve".