1221660670602 has 16 divisors (see below), whose sum is σ = 2502914545152. Its totient is φ = 397288022880.

The previous prime is 1221660670583. The next prime is 1221660670639. The reversal of 1221660670602 is 2060760661221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2483049898 + ... + 2483050389.

It is an arithmetic number, because the mean of its divisors is an integer number (156432159072).

Almost surely, 2^{1221660670602} is an apocalyptic number.

1221660670602 is an abundant number, since it is smaller than the sum of its proper divisors (1281253874550).

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

1221660670602 is a wasteful number, since it uses less digits than its factorization.

1221660670602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4966100333.

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 1221660670602 in words is "one trillion, two hundred twenty-one billion, six hundred sixty million, six hundred seventy thousand, six hundred two".