2151243121 has 8 divisors (see below), whose sum is σ = 2278195200. Its totient is φ = 2024336448.

The previous prime is 2151243103. The next prime is 2151243151. The reversal of 2151243121 is 1213421512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2151243121 - 2⁷ = 2151242993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151243092 and 2151243101.

It is not an unprimeable number, because it can be changed into a prime (2151243151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161680 + ... + 174478.

It is an arithmetic number, because the mean of its divisors is an integer number (284774400).

Almost surely, 2^2151243121 is an apocalyptic number.

It is an amenable number.

2151243121 is a deficient number, since it is larger than the sum of its proper divisors (126952079).

2151243121 is a wasteful number, since it uses less digits than its factorization.

2151243121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22703.

The product of its digits is 480, while the sum is 22.

The square root of 2151243121 is about 46381.4954588573. The cubic root of 2151243121 is about 1290.9115847053.

Adding to 2151243121 its reverse (1213421512), we get a palindrome (3364664633).

The spelling of 2151243121 in words is "two billion, one hundred fifty-one million, two hundred forty-three thousand, one hundred twenty-one".