7121555117216 has 48 divisors (see below), whose sum is σ = 14103086797800. Its totient is φ = 3539844661248.

The previous prime is 7121555117197. The next prime is 7121555117227. The reversal of 7121555117216 is 6127115551217.

It can be written as a sum of positive squares in 4 ways, for example, as 3392006227600 + 3729548889616 = 1841740^2 + 1931204^2 .

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, 8422040 + ... + 9228968.

Almost surely, 2^{7121555117216} is an apocalyptic number.

It is an amenable number.

7121555117216 is a deficient number, since it is larger than the sum of its proper divisors (6981531680584).

7121555117216 is a wasteful number, since it uses less digits than its factorization.

7121555117216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808561 (or 808553 counting only the distinct ones).

The product of its digits is 147000, while the sum is 44.

The spelling of 7121555117216 in words is "seven trillion, one hundred twenty-one billion, five hundred fifty-five million, one hundred seventeen thousand, two hundred sixteen".