121053221 has 4 divisors (see below), whose sum is σ = 125227500. Its totient is φ = 116878944.

The previous prime is 121053203. The next prime is 121053239. The reversal of 121053221 is 122350121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122350121 = 3851 ⋅31771.

It is an interprime number because it is at equal distance from previous prime (121053203) and next prime (121053239).

It can be written as a sum of positive squares in 2 ways, for example, as 103530625 + 17522596 = 10175^2 + 4186^2 .

It is a cyclic number.

It is not a de Polignac number, because 121053221 - 2⁶ = 121053157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121053221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121053271) 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, 2087096 + ... + 2087153.

It is an arithmetic number, because the mean of its divisors is an integer number (31306875).

Almost surely, 2^121053221 is an apocalyptic number.

It is an amenable number.

121053221 is a deficient number, since it is larger than the sum of its proper divisors (4174279).

121053221 is an equidigital number, since it uses as much as digits as its factorization.

121053221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174278.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 121053221 is about 11002.4188704121. The cubic root of 121053221 is about 494.6812504227.

The spelling of 121053221 in words is "one hundred twenty-one million, fifty-three thousand, two hundred twenty-one".