121405522142 has 8 divisors (see below), whose sum is σ = 183032691336. Its totient is φ = 60394625032.

The previous prime is 121405522123. The next prime is 121405522201. The reversal of 121405522142 is 241225504121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154067528 + ... + 154068315.

It is an arithmetic number, because the mean of its divisors is an integer number (22879086417).

Almost surely, 2^121405522142 is an apocalyptic number.

121405522142 is a deficient number, since it is larger than the sum of its proper divisors (61627169194).

121405522142 is a wasteful number, since it uses less digits than its factorization.

121405522142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308136042.

The product of its (nonzero) digits is 6400, while the sum is 29.

The spelling of 121405522142 in words is "one hundred twenty-one billion, four hundred five million, five hundred twenty-two thousand, one hundred forty-two".