211431203899 has 2 divisors, whose sum is σ = 211431203900. Its totient is φ = 211431203898.

The previous prime is 211431203869. The next prime is 211431203909. The reversal of 211431203899 is 998302134112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211431203899 - 2¹³ = 211431195707 is a prime.

It is not a weakly prime, because it can be changed into another prime (211431203869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105715601949 + 105715601950.

It is an arithmetic number, because the mean of its divisors is an integer number (105715601950).

Almost surely, 2^211431203899 is an apocalyptic number.

211431203899 is a deficient number, since it is larger than the sum of its proper divisors (1).

211431203899 is an equidigital number, since it uses as much as digits as its factorization.

211431203899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 211431203899 in words is "two hundred eleven billion, four hundred thirty-one million, two hundred three thousand, eight hundred ninety-nine".