210120101057 has 2 divisors, whose sum is σ = 210120101058. Its totient is φ = 210120101056.

The previous prime is 210120100969. The next prime is 210120101063. The reversal of 210120101057 is 750101021012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163963445776 + 46156655281 = 404924^2 + 214841^2 .

It is a cyclic number.

It is not a de Polignac number, because 210120101057 - 2¹⁴ = 210120084673 is a prime.

It is not a weakly prime, because it can be changed into another prime (210120001057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060050528 + 105060050529.

It is an arithmetic number, because the mean of its divisors is an integer number (105060050529).

Almost surely, 2^210120101057 is an apocalyptic number.

It is an amenable number.

210120101057 is a deficient number, since it is larger than the sum of its proper divisors (1).

210120101057 is an equidigital number, since it uses as much as digits as its factorization.

210120101057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 140, while the sum is 20.

Adding to 210120101057 its reverse (750101021012), we get a palindrome (960221122069).

The spelling of 210120101057 in words is "two hundred ten billion, one hundred twenty million, one hundred one thousand, fifty-seven".