121213431242 has 8 divisors (see below), whose sum is σ = 183519400896. Its totient is φ = 60040297612.

The previous prime is 121213431233. The next prime is 121213431277. The reversal of 121213431242 is 242134312121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283208738 + ... + 283209165.

It is an arithmetic number, because the mean of its divisors is an integer number (22939925112).

Almost surely, 2^121213431242 is an apocalyptic number.

121213431242 is a deficient number, since it is larger than the sum of its proper divisors (62305969654).

121213431242 is a wasteful number, since it uses less digits than its factorization.

121213431242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566418012.

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

Adding to 121213431242 its reverse (242134312121), we get a palindrome (363347743363).

The spelling of 121213431242 in words is "one hundred twenty-one billion, two hundred thirteen million, four hundred thirty-one thousand, two hundred forty-two".