121215244242 has 32 divisors (see below), whose sum is σ = 243850501440. Its totient is φ = 40168560960.

The previous prime is 121215244201. The next prime is 121215244273. The reversal of 121215244242 is 242442512121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3591984 + ... + 3625572.

It is an arithmetic number, because the mean of its divisors is an integer number (7620328170).

Almost surely, 2^121215244242 is an apocalyptic number.

121215244242 is an abundant number, since it is smaller than the sum of its proper divisors (122635257198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121215244242 is a wasteful number, since it uses less digits than its factorization.

121215244242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37098.

The product of its digits is 10240, while the sum is 30.

Adding to 121215244242 its reverse (242442512121), we get a palindrome (363657756363).

The spelling of 121215244242 in words is "one hundred twenty-one billion, two hundred fifteen million, two hundred forty-four thousand, two hundred forty-two".