1221054753104 has 20 divisors (see below), whose sum is σ = 2366475673140. Its totient is φ = 610351353600.

The previous prime is 1221054753073. The next prime is 1221054753119. The reversal of 1221054753104 is 4013574501221.

It can be written as a sum of positive squares in 2 ways, for example, as 654888799504 + 566165953600 = 809252^2 + 752440^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10944197 + ... + 11055204.

It is an arithmetic number, because the mean of its divisors is an integer number (118323783657).

Almost surely, 2^{1221054753104} is an apocalyptic number.

It is an amenable number.

1221054753104 is a deficient number, since it is larger than the sum of its proper divisors (1145420920036).

1221054753104 is a wasteful number, since it uses less digits than its factorization.

1221054753104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22002878 (or 22002872 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The spelling of 1221054753104 in words is "one trillion, two hundred twenty-one billion, fifty-four million, seven hundred fifty-three thousand, one hundred four".