210123113442 has 64 divisors (see below), whose sum is σ = 470955340800. Its totient is φ = 61937714880.

The previous prime is 210123113437. The next prime is 210123113527. The reversal of 210123113442 is 244311321012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13762809 + ... + 13778067.

It is an arithmetic number, because the mean of its divisors is an integer number (7358677200).

Almost surely, 2^210123113442 is an apocalyptic number.

210123113442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

210123113442 is an abundant number, since it is smaller than the sum of its proper divisors (260832227358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210123113442 is a wasteful number, since it uses less digits than its factorization.

210123113442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20951.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 210123113442 its reverse (244311321012), we get a palindrome (454434434454).

The spelling of 210123113442 in words is "two hundred ten billion, one hundred twenty-three million, one hundred thirteen thousand, four hundred forty-two".