2120431087 has 2 divisors, whose sum is σ = 2120431088. Its totient is φ = 2120431086.

The previous prime is 2120431057. The next prime is 2120431147. The reversal of 2120431087 is 7801340212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120431087 - 2⁷ = 2120430959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120431037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060215543 + 1060215544.

It is an arithmetic number, because the mean of its divisors is an integer number (1060215544).

Almost surely, 2^2120431087 is an apocalyptic number.

2120431087 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120431087 is an equidigital number, since it uses as much as digits as its factorization.

2120431087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 2120431087 is about 46048.1388006073. The cubic root of 2120431087 is about 1284.7187253973.

Adding to 2120431087 its reverse (7801340212), we get a palindrome (9921771299).

The spelling of 2120431087 in words is "two billion, one hundred twenty million, four hundred thirty-one thousand, eighty-seven".