210121010023 has 2 divisors, whose sum is σ = 210121010024. Its totient is φ = 210121010022.

The previous prime is 210121010017. The next prime is 210121010039. The reversal of 210121010023 is 320010121012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210121010023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210121009985 and 210121010012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210121010063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060505011 + 105060505012.

It is an arithmetic number, because the mean of its divisors is an integer number (105060505012).

Almost surely, 2^210121010023 is an apocalyptic number.

210121010023 is a deficient number, since it is larger than the sum of its proper divisors (1).

210121010023 is an equidigital number, since it uses as much as digits as its factorization.

210121010023 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 210121010023 its reverse (320010121012), we get a palindrome (530131131035).

The spelling of 210121010023 in words is "two hundred ten billion, one hundred twenty-one million, ten thousand, twenty-three".