1221617322212 has 24 divisors (see below), whose sum is σ = 2467425092160. Its totient is φ = 518366613600.

The previous prime is 1221617322179. The next prime is 1221617322223. The reversal of 1221617322212 is 2122237161221.

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, 215983262 + ... + 215988917.

It is an arithmetic number, because the mean of its divisors is an integer number (102809378840).

Almost surely, 2^{1221617322212} is an apocalyptic number.

It is an amenable number.

1221617322212 is an abundant number, since it is smaller than the sum of its proper divisors (1245807769948).

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

1221617322212 is a wasteful number, since it uses less digits than its factorization.

1221617322212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431972291 (or 431972289 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The spelling of 1221617322212 in words is "one trillion, two hundred twenty-one billion, six hundred seventeen million, three hundred twenty-two thousand, two hundred twelve".