121465021 has 4 divisors (see below), whose sum is σ = 125653500. Its totient is φ = 117276544.

The previous prime is 121464991. The next prime is 121465027. The reversal of 121465021 is 120564121.

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 39200121 + 82264900 = 6261^2 + 9070^2 .

It is a cyclic number.

It is not a de Polignac number, because 121465021 - 2⁵ = 121464989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121464983 and 121465001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121465027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2094196 + ... + 2094253.

It is an arithmetic number, because the mean of its divisors is an integer number (31413375).

Almost surely, 2^121465021 is an apocalyptic number.

It is an amenable number.

121465021 is a deficient number, since it is larger than the sum of its proper divisors (4188479).

121465021 is an equidigital number, since it uses as much as digits as its factorization.

121465021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4188478.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 121465021 is about 11021.1170486480. The cubic root of 121465021 is about 495.2415526845.

The spelling of 121465021 in words is "one hundred twenty-one million, four hundred sixty-five thousand, twenty-one".