220221221211212 has 96 divisors (see below), whose sum is σ = 428901971839488. Its totient is φ = 98251315200000.

The previous prime is 220221221211209. The next prime is 220221221211247. The reversal of 220221221211212 is 212112122122022.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15292071212 + ... + 15292085612.

It is an arithmetic number, because the mean of its divisors is an integer number (4467728873328).

Almost surely, 2^{220221221211212} is an apocalyptic number.

It is an amenable number.

220221221211212 is a deficient number, since it is larger than the sum of its proper divisors (208680750628276).

220221221211212 is a wasteful number, since it uses less digits than its factorization.

220221221211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24451 (or 24449 counting only the distinct ones).

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

Adding to 220221221211212 its reverse (212112122122022), we get a palindrome (432333343333234).

The spelling of 220221221211212 in words is "two hundred twenty trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twelve".