121356057 has 4 divisors (see below), whose sum is σ = 161808080. Its totient is φ = 80904036.

The previous prime is 121356049. The next prime is 121356071. The reversal of 121356057 is 750653121.

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 not a de Polignac number, because 121356057 - 2³ = 121356049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121356007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20226007 + ... + 20226012.

It is an arithmetic number, because the mean of its divisors is an integer number (40452020).

Almost surely, 2^121356057 is an apocalyptic number.

It is an amenable number.

121356057 is a deficient number, since it is larger than the sum of its proper divisors (40452023).

121356057 is an equidigital number, since it uses as much as digits as its factorization.

121356057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40452022.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 121356057 is about 11016.1725204356. The cubic root of 121356057 is about 495.0934177326.

The spelling of 121356057 in words is "one hundred twenty-one million, three hundred fifty-six thousand, fifty-seven".