212211002091 has 16 divisors (see below), whose sum is σ = 326827640448. Its totient is φ = 121047273600.

The previous prime is 212211002083. The next prime is 212211002099. The reversal of 212211002091 is 190200112212.

It is an interprime number because it is at equal distance from previous prime (212211002083) and next prime (212211002099).

It is not a de Polignac number, because 212211002091 - 2³ = 212211002083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212211002099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189135805 + ... + 189136926.

It is an arithmetic number, because the mean of its divisors is an integer number (20426727528).

Almost surely, 2^212211002091 is an apocalyptic number.

212211002091 is a deficient number, since it is larger than the sum of its proper divisors (114616638357).

212211002091 is a wasteful number, since it uses less digits than its factorization.

212211002091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378272762.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 212211002091 in words is "two hundred twelve billion, two hundred eleven million, two thousand, ninety-one".