2142121331 has 8 divisors (see below), whose sum is σ = 2475646560. Its totient is φ = 1815473088.

The previous prime is 2142121321. The next prime is 2142121349. The reversal of 2142121331 is 1331212412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142121331 is a prime.

It is a super-2 number, since 2×2142121331² = 9177367593450423122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2142121321) 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, 1718576 + ... + 1719821.

It is an arithmetic number, because the mean of its divisors is an integer number (309455820).

Almost surely, 2^2142121331 is an apocalyptic number.

2142121331 is a deficient number, since it is larger than the sum of its proper divisors (333525229).

2142121331 is an equidigital number, since it uses as much as digits as its factorization.

2142121331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438493.

The product of its digits is 288, while the sum is 20.

The square root of 2142121331 is about 46283.0566298295. The cubic root of 2142121331 is about 1289.0844074894.

Adding to 2142121331 its reverse (1331212412), we get a palindrome (3473333743).

The spelling of 2142121331 in words is "two billion, one hundred forty-two million, one hundred twenty-one thousand, three hundred thirty-one".