121635001 has 4 divisors (see below), whose sum is σ = 122381392. Its totient is φ = 120888612.

The previous prime is 121634897. The next prime is 121635029. The reversal of 121635001 is 100536121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121635001 - 2⁹ = 121634489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121635001.

It is not an unprimeable number, because it can be changed into a prime (121635061) 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, 372951 + ... + 373276.

It is an arithmetic number, because the mean of its divisors is an integer number (30595348).

Almost surely, 2^121635001 is an apocalyptic number.

It is an amenable number.

121635001 is a deficient number, since it is larger than the sum of its proper divisors (746391).

121635001 is an equidigital number, since it uses as much as digits as its factorization.

121635001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746390.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 121635001 is about 11028.8259121268. The cubic root of 121635001 is about 495.4724611957.

The spelling of 121635001 in words is "one hundred twenty-one million, six hundred thirty-five thousand, one".