2143232413121 has 4 divisors (see below), whose sum is σ = 2143841808852. Its totient is φ = 2142623017392.

The previous prime is 2143232413073. The next prime is 2143232413139. The reversal of 2143232413121 is 1213142323412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1383352345600 + 759880067521 = 1176160^2 + 871711^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143232413121 - 2²⁶ = 2143165304257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143232413321) 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, 304692590 + ... + 304699623.

It is an arithmetic number, because the mean of its divisors is an integer number (535960452213).

Almost surely, 2^{2143232413121} is an apocalyptic number.

It is an amenable number.

2143232413121 is a deficient number, since it is larger than the sum of its proper divisors (609395731).

2143232413121 is an equidigital number, since it uses as much as digits as its factorization.

2143232413121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609395730.

The product of its digits is 6912, while the sum is 29.

Adding to 2143232413121 its reverse (1213142323412), we get a palindrome (3356374736533).

The spelling of 2143232413121 in words is "two trillion, one hundred forty-three billion, two hundred thirty-two million, four hundred thirteen thousand, one hundred twenty-one".