222121102221212 has 6 divisors (see below), whose sum is σ = 388711928887128. Its totient is φ = 111060551110604.

The previous prime is 222121102221127. The next prime is 222121102221247. The reversal of 222121102221212 is 212122201121222.

It is a super-2 number, since 2×222121102221212² (a number of 29 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 as a sum of consecutive naturals, namely, 27765137777648 + ... + 27765137777655.

It is an arithmetic number, because the mean of its divisors is an integer number (64785321481188).

Almost surely, 2^{222121102221212} is an apocalyptic number.

It is an amenable number.

222121102221212 is a deficient number, since it is larger than the sum of its proper divisors (166590826665916).

222121102221212 is a wasteful number, since it uses less digits than its factorization.

222121102221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55530275555307 (or 55530275555305 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 222121102221212 its reverse (212122201121222), we get a palindrome (434243303342434).

The spelling of 222121102221212 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred two million, two hundred twenty-one thousand, two hundred twelve".