2121202231 has 2 divisors, whose sum is σ = 2121202232. Its totient is φ = 2121202230.

The previous prime is 2121202211. The next prime is 2121202271. The reversal of 2121202231 is 1322021212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121202231 - 2¹¹ = 2121200183 is a prime.

It is a super-2 number, since 2×2121202231² = 8998997809598754722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121202211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060601115 + 1060601116.

It is an arithmetic number, because the mean of its divisors is an integer number (1060601116).

Almost surely, 2^2121202231 is an apocalyptic number.

2121202231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121202231 is an equidigital number, since it uses as much as digits as its factorization.

2121202231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2121202231 is about 46056.5112769085. The cubic root of 2121202231 is about 1284.8744457867.

Adding to 2121202231 its reverse (1322021212), we get a palindrome (3443223443).

The spelling of 2121202231 in words is "two billion, one hundred twenty-one million, two hundred two thousand, two hundred thirty-one".