121570772457 has 16 divisors (see below), whose sum is σ = 169815840768. Its totient is φ = 77214522000.

The previous prime is 121570772303. The next prime is 121570772473. The reversal of 121570772457 is 754277075121.

It is not a de Polignac number, because 121570772457 - 2¹⁹ = 121570248169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121570771457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3492433 + ... + 3527070.

It is an arithmetic number, because the mean of its divisors is an integer number (10613490048).

Almost surely, 2^121570772457 is an apocalyptic number.

It is an amenable number.

121570772457 is a deficient number, since it is larger than the sum of its proper divisors (48245068311).

121570772457 is a wasteful number, since it uses less digits than its factorization.

121570772457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7019780.

The product of its (nonzero) digits is 960400, while the sum is 48.

The spelling of 121570772457 in words is "one hundred twenty-one billion, five hundred seventy million, seven hundred seventy-two thousand, four hundred fifty-seven".