210021021020123 has 2 divisors, whose sum is σ = 210021021020124. Its totient is φ = 210021021020122.

The previous prime is 210021021020119. The next prime is 210021021020143. The reversal of 210021021020123 is 321020120120012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210021021020123 - 2² = 210021021020119 is a prime.

It is not a weakly prime, because it can be changed into another prime (210021021020143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010510510061 + 105010510510062.

It is an arithmetic number, because the mean of its divisors is an integer number (105010510510062).

Almost surely, 2^{210021021020123} is an apocalyptic number.

210021021020123 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021021020123 is an equidigital number, since it uses as much as digits as its factorization.

210021021020123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 210021021020123 its reverse (321020120120012), we get a palindrome (531041141140135).

The spelling of 210021021020123 in words is "two hundred ten trillion, twenty-one billion, twenty-one million, twenty thousand, one hundred twenty-three".