121755744357 has 64 divisors (see below), whose sum is σ = 180716126976. Its totient is φ = 72457666560.

The previous prime is 121755744301. The next prime is 121755744389. The reversal of 121755744357 is 753447557121.

It is not a de Polignac number, because 121755744357 - 2⁸ = 121755744101 is a prime.

It is a super-2 number, since 2×121755744357² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121755740357) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32371357 + ... + 32375117.

It is an arithmetic number, because the mean of its divisors is an integer number (2823689484).

Almost surely, 2^121755744357 is an apocalyptic number.

It is an amenable number.

121755744357 is a deficient number, since it is larger than the sum of its proper divisors (58960382619).

121755744357 is a wasteful number, since it uses less digits than its factorization.

121755744357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070.

The product of its digits is 4116000, while the sum is 51.

The spelling of 121755744357 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred forty-four thousand, three hundred fifty-seven".