231421133142 has 24 divisors (see below), whose sum is σ = 501445415016. Its totient is φ = 77135306976.

The previous prime is 231421133129. The next prime is 231421133143. The reversal of 231421133142 is 241331124132.

231421133142 is a `hidden beast` number, since 2 + 314 + 2 + 11 + 331 + 4 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231421133143) 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, 135868 + ... + 693759.

It is an arithmetic number, because the mean of its divisors is an integer number (20893558959).

Almost surely, 2^231421133142 is an apocalyptic number.

231421133142 is an abundant number, since it is smaller than the sum of its proper divisors (270024281874).

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

231421133142 is a wasteful number, since it uses less digits than its factorization.

231421133142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845132 (or 845129 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 231421133142 its reverse (241331124132), we get a palindrome (472752257274).

The spelling of 231421133142 in words is "two hundred thirty-one billion, four hundred twenty-one million, one hundred thirty-three thousand, one hundred forty-two".