212331099989 has 2 divisors, whose sum is σ = 212331099990. Its totient is φ = 212331099988.

The previous prime is 212331099961. The next prime is 212331100021. The reversal of 212331099989 is 989990133212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208353905764 + 3977194225 = 456458^2 + 63065^2 .

It is a cyclic number.

It is not a de Polignac number, because 212331099989 - 2¹⁶ = 212331034453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212331092989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106165549994 + 106165549995.

It is an arithmetic number, because the mean of its divisors is an integer number (106165549995).

Almost surely, 2^212331099989 is an apocalyptic number.

It is an amenable number.

212331099989 is a deficient number, since it is larger than the sum of its proper divisors (1).

212331099989 is an equidigital number, since it uses as much as digits as its factorization.

212331099989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1889568, while the sum is 56.

The spelling of 212331099989 in words is "two hundred twelve billion, three hundred thirty-one million, ninety-nine thousand, nine hundred eighty-nine".