121550001 has 8 divisors (see below), whose sum is σ = 162418560. Its totient is φ = 80857392.

The previous prime is 121549957. The next prime is 121550047. The reversal of 121550001 is 100055121.

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

It is not a de Polignac number, because 121550001 - 2⁷ = 121549873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121550081) 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, 42366 + ... + 45143.

It is an arithmetic number, because the mean of its divisors is an integer number (20302320).

Almost surely, 2^121550001 is an apocalyptic number.

It is an amenable number.

121550001 is a deficient number, since it is larger than the sum of its proper divisors (40868559).

121550001 is an equidigital number, since it uses as much as digits as its factorization.

121550001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87975.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 121550001 is about 11024.9717006440. The cubic root of 121550001 is about 495.3570202649.

The spelling of 121550001 in words is "one hundred twenty-one million, five hundred fifty thousand, one".