221012262210091 has 12 divisors (see below), whose sum is σ = 242932039912576. Its totient is φ = 200919240727920.

The previous prime is 221012262209989. The next prime is 221012262210101. The reversal of 221012262210091 is 190012262210122.

It is not a de Polignac number, because 221012262210091 - 2³³ = 221003672275499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221012262210191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20503606 + ... + 29367028.

Almost surely, 2^{221012262210091} is an apocalyptic number.

221012262210091 is a deficient number, since it is larger than the sum of its proper divisors (21919777702485).

221012262210091 is a wasteful number, since it uses less digits than its factorization.

221012262210091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9069522 (or 9069511 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

Adding to 221012262210091 its sum of digits (31), we get a palindrome (221012262210122).

The spelling of 221012262210091 in words is "two hundred twenty-one trillion, twelve billion, two hundred sixty-two million, two hundred ten thousand, ninety-one".