1533130121 has 4 divisors (see below), whose sum is σ = 1613821200. Its totient is φ = 1452439044.

The previous prime is 1533130117. The next prime is 1533130189. The reversal of 1533130121 is 1210313351.

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.

It is a cyclic number.

It is not a de Polignac number, because 1533130121 - 2² = 1533130117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1533130093 and 1533130102.

It is not an unprimeable number, because it can be changed into a prime (1533130111) 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, 40345511 + ... + 40345548.

It is an arithmetic number, because the mean of its divisors is an integer number (403455300).

Almost surely, 2^1533130121 is an apocalyptic number.

It is an amenable number.

1533130121 is a deficient number, since it is larger than the sum of its proper divisors (80691079).

1533130121 is an equidigital number, since it uses as much as digits as its factorization.

1533130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80691078.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1533130121 is about 39155.2055415369. The cubic root of 1533130121 is about 1153.0806176576.

Adding to 1533130121 its reverse (1210313351), we get a palindrome (2743443472).

The spelling of 1533130121 in words is "one billion, five hundred thirty-three million, one hundred thirty thousand, one hundred twenty-one".