121542442042 has 32 divisors (see below), whose sum is σ = 214318081152. Its totient is φ = 50604035904.

The previous prime is 121542442003. The next prime is 121542442057. The reversal of 121542442042 is 240244245121.

It is a junction number, because it is equal to n+sod(n) for n = 121542441995 and 121542442013.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158593 + ... + 517915.

It is an arithmetic number, because the mean of its divisors is an integer number (6697440036).

Almost surely, 2^121542442042 is an apocalyptic number.

121542442042 is a deficient number, since it is larger than the sum of its proper divisors (92775639110).

121542442042 is a wasteful number, since it uses less digits than its factorization.

121542442042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360022.

The product of its (nonzero) digits is 20480, while the sum is 31.

Adding to 121542442042 its reverse (240244245121), we get a palindrome (361786687163).

The spelling of 121542442042 in words is "one hundred twenty-one billion, five hundred forty-two million, four hundred forty-two thousand, forty-two".