1221565270796 has 24 divisors (see below), whose sum is σ = 2376444599424. Its totient is φ = 545612279040.

The previous prime is 1221565270787. The next prime is 1221565270837. The reversal of 1221565270796 is 6970725651221.

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, 378895805 + ... + 378899028.

It is an arithmetic number, because the mean of its divisors is an integer number (99018524976).

Almost surely, 2^{1221565270796} is an apocalyptic number.

It is an amenable number.

1221565270796 is a deficient number, since it is larger than the sum of its proper divisors (1154879328628).

1221565270796 is a wasteful number, since it uses less digits than its factorization.

1221565270796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757794881 (or 757794879 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 53.

The spelling of 1221565270796 in words is "one trillion, two hundred twenty-one billion, five hundred sixty-five million, two hundred seventy thousand, seven hundred ninety-six".