2012321291 has 2 divisors, whose sum is σ = 2012321292. Its totient is φ = 2012321290.

The previous prime is 2012321251. The next prime is 2012321303. The reversal of 2012321291 is 1921232102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2012321291 - 2²⁶ = 1945212427 is a prime.

It is not a weakly prime, because it can be changed into another prime (2012321231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006160645 + 1006160646.

It is an arithmetic number, because the mean of its divisors is an integer number (1006160646).

Almost surely, 2^2012321291 is an apocalyptic number.

2012321291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012321291 is an equidigital number, since it uses as much as digits as its factorization.

2012321291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2012321291 is about 44858.9042554541. The cubic root of 2012321291 is about 1262.5030638229.

Adding to 2012321291 its reverse (1921232102), we get a palindrome (3933553393).

It can be divided in two parts, 20123 and 21291, that added together give a palindrome (41414).

The spelling of 2012321291 in words is "two billion, twelve million, three hundred twenty-one thousand, two hundred ninety-one".