153203121 has 12 divisors (see below), whose sum is σ = 222178320. Its totient is φ = 101727000.

The previous prime is 153203111. The next prime is 153203173. The reversal of 153203121 is 121302351.

It is not a de Polignac number, because 153203121 - 2¹⁹ = 152678833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 153203094 and 153203103.

It is not an unprimeable number, because it can be changed into a prime (153203111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31651 + ... + 36168.

It is an arithmetic number, because the mean of its divisors is an integer number (18514860).

Almost surely, 2^153203121 is an apocalyptic number.

It is an amenable number.

153203121 is a deficient number, since it is larger than the sum of its proper divisors (68975199).

153203121 is a wasteful number, since it uses less digits than its factorization.

153203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68076 (or 68073 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 153203121 is about 12377.5248333421. The cubic root of 153203121 is about 535.0847054863.

Adding to 153203121 its reverse (121302351), we get a palindrome (274505472).

The spelling of 153203121 in words is "one hundred fifty-three million, two hundred three thousand, one hundred twenty-one".