202144123 has 4 divisors (see below), whose sum is σ = 209114640. Its totient is φ = 195173608.

The previous prime is 202144051. The next prime is 202144139. The reversal of 202144123 is 321441202.

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 202144123 - 2²⁵ = 168589691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202144123.

It is not an unprimeable number, because it can be changed into a prime (202144193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3485215 + ... + 3485272.

It is an arithmetic number, because the mean of its divisors is an integer number (52278660).

Almost surely, 2^202144123 is an apocalyptic number.

202144123 is a deficient number, since it is larger than the sum of its proper divisors (6970517).

202144123 is an equidigital number, since it uses as much as digits as its factorization.

202144123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6970516.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 202144123 is about 14217.7397289443. The cubic root of 202144123 is about 586.8859416567.

Adding to 202144123 its reverse (321441202), we get a palindrome (523585325).

The spelling of 202144123 in words is "two hundred two million, one hundred forty-four thousand, one hundred twenty-three".