121862691942 has 8 divisors (see below), whose sum is σ = 243725383896. Its totient is φ = 40620897312.

The previous prime is 121862691911. The next prime is 121862691961. The reversal of 121862691942 is 249196268121.

It is a happy number.

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

121862691942 is an admirable number.

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, 10155224323 + ... + 10155224334.

It is an arithmetic number, because the mean of its divisors is an integer number (30465672987).

Almost surely, 2^121862691942 is an apocalyptic number.

121862691942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121862691942 is a wasteful number, since it uses less digits than its factorization.

121862691942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20310448662.

The product of its digits is 746496, while the sum is 51.

The spelling of 121862691942 in words is "one hundred twenty-one billion, eight hundred sixty-two million, six hundred ninety-one thousand, nine hundred forty-two".