121622457977 has 4 divisors (see below), whose sum is σ = 123087788880. Its totient is φ = 120157127076.

The previous prime is 121622457967. The next prime is 121622457997. The reversal of 121622457977 is 779754226121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121622457977 - 2³⁴ = 104442588793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121622457907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732665327 + ... + 732665492.

It is an arithmetic number, because the mean of its divisors is an integer number (30771947220).

Almost surely, 2^121622457977 is an apocalyptic number.

It is an amenable number.

121622457977 is a deficient number, since it is larger than the sum of its proper divisors (1465330903).

121622457977 is an equidigital number, since it uses as much as digits as its factorization.

121622457977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465330902.

The product of its digits is 2963520, while the sum is 53.

The spelling of 121622457977 in words is "one hundred twenty-one billion, six hundred twenty-two million, four hundred fifty-seven thousand, nine hundred seventy-seven".