121661042 has 8 divisors (see below), whose sum is σ = 184542300. Its totient is φ = 60146944.

The previous prime is 121661041. The next prime is 121661077. The reversal of 121661042 is 240166121.

It can be written as a sum of positive squares in 2 ways, for example, as 121638841 + 22201 = 11029^2 + 149^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 121660999 and 121661017.

It is not an unprimeable number, because it can be changed into a prime (121661041) 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, 341567 + ... + 341922.

Almost surely, 2^121661042 is an apocalyptic number.

121661042 is a deficient number, since it is larger than the sum of its proper divisors (62881258).

121661042 is an equidigital number, since it uses as much as digits as its factorization.

121661042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683580.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 121661042 is about 11030.0064369881. The cubic root of 121661042 is about 495.5078174599.

The spelling of 121661042 in words is "one hundred twenty-one million, six hundred sixty-one thousand, forty-two".