121440057 has 16 divisors (see below), whose sum is σ = 165722112. Its totient is φ = 79066640.

The previous prime is 121440049. The next prime is 121440071. The reversal of 121440057 is 750044121.

It is a cyclic number.

It is not a de Polignac number, because 121440057 - 2³ = 121440049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121440047) 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, 124582 + ... + 125552.

It is an arithmetic number, because the mean of its divisors is an integer number (10357632).

Almost surely, 2^121440057 is an apocalyptic number.

It is an amenable number.

121440057 is a deficient number, since it is larger than the sum of its proper divisors (44282055).

121440057 is an equidigital number, since it uses as much as digits as its factorization.

121440057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 121440057 is about 11019.9844373756. The cubic root of 121440057 is about 495.2076223203.

Adding to 121440057 its reverse (750044121), we get a palindrome (871484178).

The spelling of 121440057 in words is "one hundred twenty-one million, four hundred forty thousand, fifty-seven".