142442313121 has 4 divisors (see below), whose sum is σ = 142824196372. Its totient is φ = 142060429872.

The previous prime is 142442313113. The next prime is 142442313133. The reversal of 142442313121 is 121313244241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121313244241 = 7 ⋅17330463463.

It can be written as a sum of positive squares in 2 ways, for example, as 105017476096 + 37424837025 = 324064^2 + 193455^2 .

It is a cyclic number.

It is not a de Polignac number, because 142442313121 - 2³ = 142442313113 is a prime.

It is a super-2 number, since 2×142442313121² (a number of 23 digits) contains 22 as substring.

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 142442313121.

It is not an unprimeable number, because it can be changed into a prime (142442313151) 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, 190941066 + ... + 190941811.

It is an arithmetic number, because the mean of its divisors is an integer number (35706049093).

Almost surely, 2^142442313121 is an apocalyptic number.

It is an amenable number.

142442313121 is a deficient number, since it is larger than the sum of its proper divisors (381883251).

142442313121 is an equidigital number, since it uses as much as digits as its factorization.

142442313121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381883250.

The product of its digits is 4608, while the sum is 28.

Adding to 142442313121 its reverse (121313244241), we get a palindrome (263755557362).

The spelling of 142442313121 in words is "one hundred forty-two billion, four hundred forty-two million, three hundred thirteen thousand, one hundred twenty-one".