121312341442 has 4 divisors (see below), whose sum is σ = 181968512166. Its totient is φ = 60656170720.

The previous prime is 121312341439. The next prime is 121312341457. The reversal of 121312341442 is 244143213121.

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., 113354095761 + 7958245681 = 336681^2 + 89209^2 .

It is a super-2 number, since 2×121312341442² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121312341442.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30328085359 + ... + 30328085362.

Almost surely, 2^121312341442 is an apocalyptic number.

121312341442 is a deficient number, since it is larger than the sum of its proper divisors (60656170724).

121312341442 is an equidigital number, since it uses as much as digits as its factorization.

121312341442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60656170723.

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

Adding to 121312341442 its reverse (244143213121), we get a palindrome (365455554563).

The spelling of 121312341442 in words is "one hundred twenty-one billion, three hundred twelve million, three hundred forty-one thousand, four hundred forty-two".