121139615942 has 8 divisors (see below), whose sum is σ = 181711364016. Its totient is φ = 60569161272.

The previous prime is 121139615941. The next prime is 121139615969. The reversal of 121139615942 is 249516931121.

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

It is a super-3 number, since 3×121139615942³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121139615893 and 121139615902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121139615941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39293 + ... + 493784.

It is an arithmetic number, because the mean of its divisors is an integer number (22713920502).

Almost surely, 2^121139615942 is an apocalyptic number.

121139615942 is a deficient number, since it is larger than the sum of its proper divisors (60571748074).

121139615942 is a wasteful number, since it uses less digits than its factorization.

121139615942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646702.

The product of its digits is 116640, while the sum is 44.

The spelling of 121139615942 in words is "one hundred twenty-one billion, one hundred thirty-nine million, six hundred fifteen thousand, nine hundred forty-two".