2121422231 has 8 divisors (see below), whose sum is σ = 2284284240. Its totient is φ = 1962790528.

The previous prime is 2121422213. The next prime is 2121422249. The reversal of 2121422231 is 1322241212.

It is an interprime number because it is at equal distance from previous prime (2121422213) and next prime (2121422249).

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 2121422231 - 2⁶ = 2121422167 is a prime.

It is a super-2 number, since 2×2121422231² = 9000864564362034722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121422531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1056536 + ... + 1058541.

It is an arithmetic number, because the mean of its divisors is an integer number (285535530).

Almost surely, 2^2121422231 is an apocalyptic number.

2121422231 is a deficient number, since it is larger than the sum of its proper divisors (162862009).

2121422231 is a wasteful number, since it uses less digits than its factorization.

2121422231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115153.

The product of its digits is 384, while the sum is 20.

The square root of 2121422231 is about 46058.8995852050. The cubic root of 2121422231 is about 1284.9188644033.

Adding to 2121422231 its reverse (1322241212), we get a palindrome (3443663443).

The spelling of 2121422231 in words is "two billion, one hundred twenty-one million, four hundred twenty-two thousand, two hundred thirty-one".