222001012091 has 4 divisors (see below), whose sum is σ = 231653230032. Its totient is φ = 212348794152.

The previous prime is 222001012081. The next prime is 222001012099. The reversal of 222001012091 is 190210100222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190210100222 = 2 ⋅95105050111.

It is a cyclic number.

It is not a de Polignac number, because 222001012091 - 2⁶ = 222001012027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222001012099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4826108936 + ... + 4826108981.

It is an arithmetic number, because the mean of its divisors is an integer number (57913307508).

Almost surely, 2^222001012091 is an apocalyptic number.

222001012091 is a deficient number, since it is larger than the sum of its proper divisors (9652217941).

222001012091 is an equidigital number, since it uses as much as digits as its factorization.

222001012091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9652217940.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 222001012091 in words is "two hundred twenty-two billion, one million, twelve thousand, ninety-one".