121358401 has 4 divisors (see below), whose sum is σ = 124318404. Its totient is φ = 118398400.

The previous prime is 121358389. The next prime is 121358423. The reversal of 121358401 is 104853121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3418801 + 117939600 = 1849^2 + 10860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121358401 is a prime.

It is a super-2 number, since 2×121358401² = 29455722986553602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121358441) 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 3 ways as a sum of consecutive naturals, for example, 1479940 + ... + 1480021.

It is an arithmetic number, because the mean of its divisors is an integer number (31079601).

Almost surely, 2^121358401 is an apocalyptic number.

It is an amenable number.

121358401 is a deficient number, since it is larger than the sum of its proper divisors (2960003).

121358401 is an equidigital number, since it uses as much as digits as its factorization.

121358401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2960002.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 121358401 is about 11016.2789089601. The cubic root of 121358401 is about 495.0966052991.

The spelling of 121358401 in words is "one hundred twenty-one million, three hundred fifty-eight thousand, four hundred one".