1231211430242 has 4 divisors (see below), whose sum is σ = 1846817145366. Its totient is φ = 615605715120.

The previous prime is 1231211430233. The next prime is 1231211430263. The reversal of 1231211430242 is 2420341121321.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 833001210721 + 398210219521 = 912689^2 + 631039^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307802857559 + ... + 307802857562.

Almost surely, 2^{1231211430242} is an apocalyptic number.

1231211430242 is a deficient number, since it is larger than the sum of its proper divisors (615605715124).

1231211430242 is an equidigital number, since it uses as much as digits as its factorization.

1231211430242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615605715123.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 1231211430242 its reverse (2420341121321), we get a palindrome (3651552551563).

The spelling of 1231211430242 in words is "one trillion, two hundred thirty-one billion, two hundred eleven million, four hundred thirty thousand, two hundred forty-two".