212133231091 has 2 divisors, whose sum is σ = 212133231092. Its totient is φ = 212133231090.

The previous prime is 212133231083. The next prime is 212133231179. The reversal of 212133231091 is 190132331212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212133231091 - 2³ = 212133231083 is a prime.

It is not a weakly prime, because it can be changed into another prime (212133231071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106066615545 + 106066615546.

It is an arithmetic number, because the mean of its divisors is an integer number (106066615546).

Almost surely, 2^212133231091 is an apocalyptic number.

212133231091 is a deficient number, since it is larger than the sum of its proper divisors (1).

212133231091 is an equidigital number, since it uses as much as digits as its factorization.

212133231091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 212133231091 in words is "two hundred twelve billion, one hundred thirty-three million, two hundred thirty-one thousand, ninety-one".