212022091 has 2 divisors, whose sum is σ = 212022092. Its totient is φ = 212022090.

The previous prime is 212022077. The next prime is 212022143. The reversal of 212022091 is 190220212.

212022091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212022091 is a prime.

It is a super-4 number, since 4×212022091⁴ (a number of 34 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (212022071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106011045 + 106011046.

It is an arithmetic number, because the mean of its divisors is an integer number (106011046).

Almost surely, 2^212022091 is an apocalyptic number.

212022091 is a deficient number, since it is larger than the sum of its proper divisors (1).

212022091 is an equidigital number, since it uses as much as digits as its factorization.

212022091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 212022091 is about 14560.9783668543. The cubic root of 212022091 is about 596.2939061732.

The spelling of 212022091 in words is "two hundred twelve million, twenty-two thousand, ninety-one".