2121431713 has 2 divisors, whose sum is σ = 2121431714. Its totient is φ = 2121431712.

The previous prime is 2121431687. The next prime is 2121431723. The reversal of 2121431713 is 3171341212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1644140304 + 477291409 = 40548^2 + 21847^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121431713 - 2¹⁷ = 2121300641 is a prime.

It is a super-2 number, since 2×2121431713² = 9000945025844228738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2121431723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060715856 + 1060715857.

It is an arithmetic number, because the mean of its divisors is an integer number (1060715857).

Almost surely, 2^2121431713 is an apocalyptic number.

It is an amenable number.

2121431713 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121431713 is an equidigital number, since it uses as much as digits as its factorization.

2121431713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 2121431713 is about 46059.0025185088. The cubic root of 2121431713 is about 1284.9207787767.

Adding to 2121431713 its reverse (3171341212), we get a palindrome (5292772925).

The spelling of 2121431713 in words is "two billion, one hundred twenty-one million, four hundred thirty-one thousand, seven hundred thirteen".