202013030120123 has 4 divisors (see below), whose sum is σ = 202013891498040. Its totient is φ = 202012168742208.

The previous prime is 202013030120119. The next prime is 202013030120131. The reversal of 202013030120123 is 321021030310202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 202013030120123 - 2² = 202013030120119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202013030120095 and 202013030120104.

It is not an unprimeable number, because it can be changed into a prime (202013030120183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430337078 + ... + 430806251.

It is an arithmetic number, because the mean of its divisors is an integer number (50503472874510).

Almost surely, 2^{202013030120123} is an apocalyptic number.

202013030120123 is a deficient number, since it is larger than the sum of its proper divisors (861377917).

202013030120123 is an equidigital number, since it uses as much as digits as its factorization.

202013030120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861377916.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 202013030120123 its reverse (321021030310202), we get a palindrome (523034060430325).

The spelling of 202013030120123 in words is "two hundred two trillion, thirteen billion, thirty million, one hundred twenty thousand, one hundred twenty-three".