153321121 has 4 divisors (see below), whose sum is σ = 155834644. Its totient is φ = 150807600.

The previous prime is 153321107. The next prime is 153321139. The reversal of 153321121 is 121123351.

153321121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121123351 = 17 ⋅7124903.

It can be written as a sum of positive squares in 2 ways, for example, as 33177600 + 120143521 = 5760^2 + 10961^2 .

It is a cyclic number.

It is not a de Polignac number, because 153321121 - 2¹⁷ = 153190049 is a prime.

It is a super-2 number, since 2×153321121² = 47014732289393282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153322121) 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, 1256670 + ... + 1256791.

It is an arithmetic number, because the mean of its divisors is an integer number (38958661).

Almost surely, 2^153321121 is an apocalyptic number.

It is an amenable number.

153321121 is a deficient number, since it is larger than the sum of its proper divisors (2513523).

153321121 is an equidigital number, since it uses as much as digits as its factorization.

153321121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513522.

The product of its digits is 180, while the sum is 19.

The square root of 153321121 is about 12382.2906200751. The cubic root of 153321121 is about 535.2220477529. Note that the first 3 decimals are identical.

Adding to 153321121 its reverse (121123351), we get a palindrome (274444472).

The spelling of 153321121 in words is "one hundred fifty-three million, three hundred twenty-one thousand, one hundred twenty-one".