121850661 has 8 divisors (see below), whose sum is σ = 162580320. Its totient is φ = 81177392.

The previous prime is 121850633. The next prime is 121850669. The reversal of 121850661 is 166058121.

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

It is a cyclic number.

It is not a de Polignac number, because 121850661 - 2⁹ = 121850149 is a prime.

It is a super-2 number, since 2×121850661² = 29695167172273842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121850669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8766 + ... + 17903.

It is an arithmetic number, because the mean of its divisors is an integer number (20322540).

Almost surely, 2^121850661 is an apocalyptic number.

It is an amenable number.

121850661 is a deficient number, since it is larger than the sum of its proper divisors (40729659).

121850661 is a wasteful number, since it uses less digits than its factorization.

121850661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28195.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 121850661 is about 11038.5986882394. The cubic root of 121850661 is about 495.7651140819.

The spelling of 121850661 in words is "one hundred twenty-one million, eight hundred fifty thousand, six hundred sixty-one".