121111451442 has 48 divisors (see below), whose sum is σ = 292467296160. Its totient is φ = 35995971456.

The previous prime is 121111451437. The next prime is 121111451533. The reversal of 121111451442 is 244154111121.

121111451442 is a `hidden beast` number, since 1 + 211 + 1 + 1 + 4 + 5 + 1 + 442 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10409688 + ... + 10421315.

It is an arithmetic number, because the mean of its divisors is an integer number (6093068670).

Almost surely, 2^121111451442 is an apocalyptic number.

121111451442 is an abundant number, since it is smaller than the sum of its proper divisors (171355844718).

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

121111451442 is a wasteful number, since it uses less digits than its factorization.

121111451442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20831047 (or 20831044 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

Adding to 121111451442 its reverse (244154111121), we get a palindrome (365265562563).

The spelling of 121111451442 in words is "one hundred twenty-one billion, one hundred eleven million, four hundred fifty-one thousand, four hundred forty-two".