4181253121 has 4 divisors (see below), whose sum is σ = 4243659952. Its totient is φ = 4118846292.

The previous prime is 4181253091. The next prime is 4181253133. The reversal of 4181253121 is 1213521814.

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 4181253121 - 2³¹ = 2033769473 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 4181253121.

It is not an unprimeable number, because it can be changed into a prime (4181253721) 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, 31203315 + ... + 31203448.

It is an arithmetic number, because the mean of its divisors is an integer number (1060914988).

Almost surely, 2^4181253121 is an apocalyptic number.

It is an amenable number.

4181253121 is a deficient number, since it is larger than the sum of its proper divisors (62406831).

4181253121 is an equidigital number, since it uses as much as digits as its factorization.

4181253121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62406830.

The product of its digits is 1920, while the sum is 28.

The square root of 4181253121 is about 64662.6099148496. The cubic root of 4181253121 is about 1611.0245296686.

Adding to 4181253121 its reverse (1213521814), we get a palindrome (5394774935).

The spelling of 4181253121 in words is "four billion, one hundred eighty-one million, two hundred fifty-three thousand, one hundred twenty-one".