121000000000057 has 2 divisors, whose sum is σ = 121000000000058. Its totient is φ = 121000000000056.

The previous prime is 121000000000007. The next prime is 121000000000109. The reversal of 121000000000057 is 750000000000121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116396997097536 + 4603002902521 = 10788744^2 + 2145461^2 .

It is a cyclic number.

It is not a de Polignac number, because 121000000000057 - 2⁴³ = 112203906977849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121000000000057.

It is not a weakly prime, because it can be changed into another prime (121000000000007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500000000028 + 60500000000029.

It is an arithmetic number, because the mean of its divisors is an integer number (60500000000029).

Almost surely, 2^{121000000000057} is an apocalyptic number.

It is an amenable number.

121000000000057 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000000000057 is an equidigital number, since it uses as much as digits as its factorization.

121000000000057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70, while the sum is 16.

Adding to 121000000000057 its reverse (750000000000121), we get a palindrome (871000000000178).

The spelling of 121000000000057 in words is "one hundred twenty-one trillion, fifty-seven", and thus it is an aban number.