22221202021091 has 2 divisors, whose sum is σ = 22221202021092. Its totient is φ = 22221202021090.

The previous prime is 22221202021049. The next prime is 22221202021111. The reversal of 22221202021091 is 19012020212222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22221202021091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22221202021091.

It is not a weakly prime, because it can be changed into another prime (22221202023091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110601010545 + 11110601010546.

It is an arithmetic number, because the mean of its divisors is an integer number (11110601010546).

Almost surely, 2^{22221202021091} is an apocalyptic number.

22221202021091 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221202021091 is an equidigital number, since it uses as much as digits as its factorization.

22221202021091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 22221202021091 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred two million, twenty-one thousand, ninety-one".