210202020123 has 16 divisors (see below), whose sum is σ = 302993905920. Its totient is φ = 129171083616.

The previous prime is 210202020113. The next prime is 210202020131. The reversal of 210202020123 is 321020202012.

It is a happy number.

It is not a de Polignac number, because 210202020123 - 2⁴ = 210202020107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210202020113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49832415 + ... + 49836632.

It is an arithmetic number, because the mean of its divisors is an integer number (18937119120).

Almost surely, 2^210202020123 is an apocalyptic number.

210202020123 is a deficient number, since it is larger than the sum of its proper divisors (92791885797).

210202020123 is a wasteful number, since it uses less digits than its factorization.

210202020123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99669106.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 210202020123 its reverse (321020202012), we get a palindrome (531222222135).

It can be divided in two parts, 21020202012 and 3, that multiplied together give a palindrome (63060606036).

The spelling of 210202020123 in words is "two hundred ten billion, two hundred two million, twenty thousand, one hundred twenty-three".