121102057 has 4 divisors (see below), whose sum is σ = 125278020. Its totient is φ = 116926096.

The previous prime is 121102049. The next prime is 121102129. The reversal of 121102057 is 750201121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 750201121 = 5477 ⋅136973.

It can be written as a sum of positive squares in 2 ways, for example, as 31629376 + 89472681 = 5624^2 + 9459^2 .

It is a cyclic number.

It is not a de Polignac number, because 121102057 - 2³ = 121102049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121109057) 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, 2087938 + ... + 2087995.

It is an arithmetic number, because the mean of its divisors is an integer number (31319505).

Almost surely, 2^121102057 is an apocalyptic number.

It is an amenable number.

121102057 is a deficient number, since it is larger than the sum of its proper divisors (4175963).

121102057 is an equidigital number, since it uses as much as digits as its factorization.

121102057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175962.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 121102057 is about 11004.6379767805. The cubic root of 121102057 is about 494.7477638823.

Adding to 121102057 its reverse (750201121), we get a palindrome (871303178).

The spelling of 121102057 in words is "one hundred twenty-one million, one hundred two thousand, fifty-seven".