142243402122 has 24 divisors (see below), whose sum is σ = 311371299876. Its totient is φ = 46925657856.

The previous prime is 142243402121. The next prime is 142243402141. The reversal of 142243402122 is 221204342241.

It is a happy number.

142243402122 is a `hidden beast` number, since 1 + 4 + 2 + 243 + 402 + 12 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 132111167841 + 10132234281 = 363471^2 + 100659^2 .

It is not an unprimeable number, because it can be changed into a prime (142243402121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40732333 + ... + 40735824.

Almost surely, 2^142243402122 is an apocalyptic number.

142243402122 is an abundant number, since it is smaller than the sum of its proper divisors (169127897754).

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

142243402122 is a wasteful number, since it uses less digits than its factorization.

142243402122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81468262 (or 81468259 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 142243402122 its reverse (221204342241), we get a palindrome (363447744363).

The spelling of 142243402122 in words is "one hundred forty-two billion, two hundred forty-three million, four hundred two thousand, one hundred twenty-two".