12221121109993 has 2 divisors, whose sum is σ = 12221121109994. Its totient is φ = 12221121109992.

The previous prime is 12221121109933. The next prime is 12221121110039. The reversal of 12221121109993 is 39990112112221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12033461469184 + 187659640809 = 3468928^2 + 433197^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221121109993 - 2²⁵ = 12221087555561 is a prime.

It is not a weakly prime, because it can be changed into another prime (12221121109933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110560554996 + 6110560554997.

It is an arithmetic number, because the mean of its divisors is an integer number (6110560554997).

Almost surely, 2^{12221121109993} is an apocalyptic number.

It is an amenable number.

12221121109993 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221121109993 is an equidigital number, since it uses as much as digits as its factorization.

12221121109993 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 43.

The spelling of 12221121109993 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred nine thousand, nine hundred ninety-three".