121352515442 has 16 divisors (see below), whose sum is σ = 188346090240. Its totient is φ = 58571384592.

The previous prime is 121352515397. The next prime is 121352515451. The reversal of 121352515442 is 244515253121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50333 + ... + 495215.

It is an arithmetic number, because the mean of its divisors is an integer number (11771630640).

Almost surely, 2^121352515442 is an apocalyptic number.

121352515442 is a deficient number, since it is larger than the sum of its proper divisors (66993574798).

121352515442 is a wasteful number, since it uses less digits than its factorization.

121352515442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449617.

The product of its digits is 48000, while the sum is 35.

Adding to 121352515442 its reverse (244515253121), we get a palindrome (365867768563).

The spelling of 121352515442 in words is "one hundred twenty-one billion, three hundred fifty-two million, five hundred fifteen thousand, four hundred forty-two".