212112000091 has 2 divisors, whose sum is σ = 212112000092. Its totient is φ = 212112000090.

The previous prime is 212112000047. The next prime is 212112000119. The reversal of 212112000091 is 190000211212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212112000091 - 2⁷ = 212111999963 is a prime.

It is not a weakly prime, because it can be changed into another prime (212112000391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106056000045 + 106056000046.

It is an arithmetic number, because the mean of its divisors is an integer number (106056000046).

Almost surely, 2^212112000091 is an apocalyptic number.

212112000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

212112000091 is an equidigital number, since it uses as much as digits as its factorization.

212112000091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 212112000091 in words is "two hundred twelve billion, one hundred twelve million, ninety-one", and thus it is an aban number.