22201221811 has 2 divisors, whose sum is σ = 22201221812. Its totient is φ = 22201221810.

The previous prime is 22201221797. The next prime is 22201221839. The reversal of 22201221811 is 11812210222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22201221811 - 2¹⁷ = 22201090739 is a prime.

It is not a weakly prime, because it can be changed into another prime (22201228811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100610905 + 11100610906.

It is an arithmetic number, because the mean of its divisors is an integer number (11100610906).

Almost surely, 2^22201221811 is an apocalyptic number.

22201221811 is a deficient number, since it is larger than the sum of its proper divisors (1).

22201221811 is an equidigital number, since it uses as much as digits as its factorization.

22201221811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 22.

The spelling of 22201221811 in words is "twenty-two billion, two hundred one million, two hundred twenty-one thousand, eight hundred eleven".