2151241121 has 4 divisors (see below), whose sum is σ = 2151335700. Its totient is φ = 2151146544.

The previous prime is 2151241097. The next prime is 2151241133. The reversal of 2151241121 is 1211421512.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1281640000 + 869601121 = 35800^2 + 29489^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151241121 - 2²⁶ = 2084132257 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 = 2151241093 and 2151241102.

It is not an unprimeable number, because it can be changed into a prime (2151241181) 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, 9815 + ... + 66323.

It is an arithmetic number, because the mean of its divisors is an integer number (537833925).

Almost surely, 2^2151241121 is an apocalyptic number.

It is an amenable number.

2151241121 is a deficient number, since it is larger than the sum of its proper divisors (94579).

2151241121 is an equidigital number, since it uses as much as digits as its factorization.

2151241121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94578.

The product of its digits is 160, while the sum is 20.

The square root of 2151241121 is about 46381.4738985298. The cubic root of 2151241121 is about 1290.9111846538.

Adding to 2151241121 its reverse (1211421512), we get a palindrome (3362662633).

The spelling of 2151241121 in words is "two billion, one hundred fifty-one million, two hundred forty-one thousand, one hundred twenty-one".