121536401 has 8 divisors (see below), whose sum is σ = 141253440. Its totient is φ = 102408048.

The previous prime is 121536391. The next prime is 121536413. The reversal of 121536401 is 104635121.

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 121536401 - 2¹⁰ = 121535377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121532401) 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, 146726 + ... + 147551.

It is an arithmetic number, because the mean of its divisors is an integer number (17656680).

Almost surely, 2^121536401 is an apocalyptic number.

It is an amenable number.

121536401 is a deficient number, since it is larger than the sum of its proper divisors (19717039).

121536401 is an equidigital number, since it uses as much as digits as its factorization.

121536401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294343.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 121536401 is about 11024.3549017618. The cubic root of 121536401 is about 495.3385447221.

The spelling of 121536401 in words is "one hundred twenty-one million, five hundred thirty-six thousand, four hundred one".