121002100748857 has 2 divisors, whose sum is σ = 121002100748858. Its totient is φ = 121002100748856.

The previous prime is 121002100748843. The next prime is 121002100748887. The reversal of 121002100748857 is 758847001200121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82720916770816 + 38281183978041 = 9095104^2 + 6187179^2 .

It is a cyclic number.

It is not a de Polignac number, because 121002100748857 - 2¹⁵ = 121002100716089 is a prime.

It is not a weakly prime, because it can be changed into another prime (121002100748887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501050374428 + 60501050374429.

It is an arithmetic number, because the mean of its divisors is an integer number (60501050374429).

Almost surely, 2^{121002100748857} is an apocalyptic number.

It is an amenable number.

121002100748857 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002100748857 is an equidigital number, since it uses as much as digits as its factorization.

121002100748857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250880, while the sum is 46.

Adding to 121002100748857 its reverse (758847001200121), we get a palindrome (879849101948978).

The spelling of 121002100748857 in words is "one hundred twenty-one trillion, two billion, one hundred million, seven hundred forty-eight thousand, eight hundred fifty-seven".