220221211221212 has 12 divisors (see below), whose sum is σ = 385571603672640. Its totient is φ = 110057895886176.

The previous prime is 220221211221133. The next prime is 220221211221281. The reversal of 220221211221212 is 212122112122022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13177421708 + ... + 13177438419.

It is an arithmetic number, because the mean of its divisors is an integer number (32130966972720).

Almost surely, 2^{220221211221212} is an apocalyptic number.

It is an amenable number.

220221211221212 is a deficient number, since it is larger than the sum of its proper divisors (165350392451428).

220221211221212 is a wasteful number, since it uses less digits than its factorization.

220221211221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26354862220 (or 26354862218 counting only the distinct ones).

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

Adding to 220221211221212 its reverse (212122112122022), we get a palindrome (432343323343234).

The spelling of 220221211221212 in words is "two hundred twenty trillion, two hundred twenty-one billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twelve".