121642707701842 has 8 divisors (see below), whose sum is σ = 193197241644156. Its totient is φ = 57243627153792.

The previous prime is 121642707701833. The next prime is 121642707701891. The reversal of 121642707701842 is 248107707246121.

It can be written as a sum of positive squares in 2 ways, for example, as 111194304406641 + 10448403295201 = 10544871^2 + 3232399^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 121642707701842.

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, 1788863348523 + ... + 1788863348590.

Almost surely, 2^{121642707701842} is an apocalyptic number.

121642707701842 is a deficient number, since it is larger than the sum of its proper divisors (71554533942314).

121642707701842 is a wasteful number, since it uses less digits than its factorization.

121642707701842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3577726697132.

The product of its (nonzero) digits is 2107392, while the sum is 52.

The spelling of 121642707701842 in words is "one hundred twenty-one trillion, six hundred forty-two billion, seven hundred seven million, seven hundred one thousand, eight hundred forty-two".