222221210101212 has 48 divisors (see below), whose sum is σ = 596915367310080. Its totient is φ = 63028330703232.

The previous prime is 222221210101211. The next prime is 222221210101223. The reversal of 222221210101212 is 212101012122222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221210101211) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9655063662 + ... + 9655086677.

It is an arithmetic number, because the mean of its divisors is an integer number (12435736818960).

Almost surely, 2^{222221210101212} is an apocalyptic number.

It is an amenable number.

222221210101212 is an abundant number, since it is smaller than the sum of its proper divisors (374694157208868).

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

222221210101212 is a wasteful number, since it uses less digits than its factorization.

222221210101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19310150490 (or 19310150488 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222221210101212 its reverse (212101012122222), we get a palindrome (434322222223434).

It can be divided in two parts, 22222121010 and 1212, that added together give a palindrome (22222122222).

The spelling of 222221210101212 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two hundred ten million, one hundred one thousand, two hundred twelve".