121639701 has 8 divisors (see below), whose sum is σ = 162414720. Its totient is φ = 80978912.

The previous prime is 121639669. The next prime is 121639703. The reversal of 121639701 is 107936121.

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 121639701 - 2⁵ = 121639669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121639703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26040 + ... + 30353.

It is an arithmetic number, because the mean of its divisors is an integer number (20301840).

Almost surely, 2^121639701 is an apocalyptic number.

It is an amenable number.

121639701 is a deficient number, since it is larger than the sum of its proper divisors (40775019).

121639701 is an equidigital number, since it uses as much as digits as its factorization.

121639701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57115.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 121639701 is about 11029.0389880533. The cubic root of 121639701 is about 495.4788428308.

The spelling of 121639701 in words is "one hundred twenty-one million, six hundred thirty-nine thousand, seven hundred one".