1221167672164 has 24 divisors (see below), whose sum is σ = 2331412469568. Its totient is φ = 555054222240.

The previous prime is 1221167672149. The next prime is 1221167672171. The reversal of 1221167672164 is 4612767611221.

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, 600382 + ... + 1674154.

It is an arithmetic number, because the mean of its divisors is an integer number (97142186232).

Almost surely, 2^{1221167672164} is an apocalyptic number.

It is an amenable number.

1221167672164 is a deficient number, since it is larger than the sum of its proper divisors (1110244797404).

1221167672164 is a wasteful number, since it uses less digits than its factorization.

1221167672164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099635 (or 1099633 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The spelling of 1221167672164 in words is "one trillion, two hundred twenty-one billion, one hundred sixty-seven million, six hundred seventy-two thousand, one hundred sixty-four".