422140121 has 4 divisors (see below), whose sum is σ = 454612452. Its totient is φ = 389667792.

The previous prime is 422140109. The next prime is 422140123. The reversal of 422140121 is 121041224.

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

It can be written as a sum of positive squares in 2 ways, for example, as 154654096 + 267486025 = 12436^2 + 16355^2 .

It is a cyclic number.

It is not a de Polignac number, because 422140121 - 2⁶ = 422140057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 422140121.

It is not an unprimeable number, because it can be changed into a prime (422140123) 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, 16236146 + ... + 16236171.

It is an arithmetic number, because the mean of its divisors is an integer number (113653113).

Almost surely, 2^422140121 is an apocalyptic number.

It is an amenable number.

422140121 is a deficient number, since it is larger than the sum of its proper divisors (32472331).

422140121 is a wasteful number, since it uses less digits than its factorization.

422140121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32472330.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 422140121 is about 20546.0487928945. The cubic root of 422140121 is about 750.1570758414.

Adding to 422140121 its reverse (121041224), we get a palindrome (543181345).

The spelling of 422140121 in words is "four hundred twenty-two million, one hundred forty thousand, one hundred twenty-one".