22001221109993 has 2 divisors, whose sum is σ = 22001221109994. Its totient is φ = 22001221109992.

The previous prime is 22001221109971. The next prime is 22001221110059. The reversal of 22001221109993 is 39990112210022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16161903514969 + 5839317595024 = 4020187^2 + 2416468^2 .

It is a cyclic number.

It is not a de Polignac number, because 22001221109993 - 2³⁶ = 21932501633257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22001221109993.

It is not a weakly prime, because it can be changed into another prime (22001221109393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000610554996 + 11000610554997.

It is an arithmetic number, because the mean of its divisors is an integer number (11000610554997).

Almost surely, 2^{22001221109993} is an apocalyptic number.

It is an amenable number.

22001221109993 is a deficient number, since it is larger than the sum of its proper divisors (1).

22001221109993 is an equidigital number, since it uses as much as digits as its factorization.

22001221109993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 41.

The spelling of 22001221109993 in words is "twenty-two trillion, one billion, two hundred twenty-one million, one hundred nine thousand, nine hundred ninety-three".