121251057 has 4 divisors (see below), whose sum is σ = 161668080. Its totient is φ = 80834036.

The previous prime is 121251047. The next prime is 121251071. The reversal of 121251057 is 750152121.

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 121251057 - 2⁴ = 121251041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121251007) 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, 20208507 + ... + 20208512.

It is an arithmetic number, because the mean of its divisors is an integer number (40417020).

Almost surely, 2^121251057 is an apocalyptic number.

It is an amenable number.

121251057 is a deficient number, since it is larger than the sum of its proper divisors (40417023).

121251057 is an equidigital number, since it uses as much as digits as its factorization.

121251057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40417022.

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 121251057 is about 11011.4057685656. The cubic root of 121251057 is about 494.9505878644.

The spelling of 121251057 in words is "one hundred twenty-one million, two hundred fifty-one thousand, fifty-seven".