210023100121 has 2 divisors, whose sum is σ = 210023100122. Its totient is φ = 210023100120.

The previous prime is 210023100071. The next prime is 210023100181. The reversal of 210023100121 is 121001320012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208174100121 + 1849000000 = 456261^2 + 43000^2 .

It is a cyclic number.

It is not a de Polignac number, because 210023100121 - 2²¹ = 210021002969 is a prime.

It is not a weakly prime, because it can be changed into another prime (210023100181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105011550060 + 105011550061.

It is an arithmetic number, because the mean of its divisors is an integer number (105011550061).

Almost surely, 2^210023100121 is an apocalyptic number.

It is an amenable number.

210023100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210023100121 is an equidigital number, since it uses as much as digits as its factorization.

210023100121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 210023100121 its reverse (121001320012), we get a palindrome (331024420133).

The spelling of 210023100121 in words is "two hundred ten billion, twenty-three million, one hundred thousand, one hundred twenty-one".