121453221 has 4 divisors (see below), whose sum is σ = 161937632. Its totient is φ = 80968812.

The previous prime is 121453181. The next prime is 121453229. The reversal of 121453221 is 122354121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122354121 = 3 ⋅40784707.

It is not a de Polignac number, because 121453221 - 2¹⁴ = 121436837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121453229) 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, 20242201 + ... + 20242206.

It is an arithmetic number, because the mean of its divisors is an integer number (40484408).

Almost surely, 2^121453221 is an apocalyptic number.

It is an amenable number.

121453221 is a deficient number, since it is larger than the sum of its proper divisors (40484411).

121453221 is an equidigital number, since it uses as much as digits as its factorization.

121453221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40484410.

The product of its digits is 480, while the sum is 21.

The square root of 121453221 is about 11020.5816997108. The cubic root of 121453221 is about 495.2255150370.

The spelling of 121453221 in words is "one hundred twenty-one million, four hundred fifty-three thousand, two hundred twenty-one".