221211002120993 has 2 divisors, whose sum is σ = 221211002120994. Its totient is φ = 221211002120992.

The previous prime is 221211002120981. The next prime is 221211002121019. The reversal of 221211002120993 is 399021200112122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182204831798929 + 39006170322064 = 13498327^2 + 6245492^2 .

It is a cyclic number.

It is not a de Polignac number, because 221211002120993 - 2²⁰ = 221211001072417 is a prime.

It is a super-2 number, since 2×221211002120993² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (223211002120993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605501060496 + 110605501060497.

It is an arithmetic number, because the mean of its divisors is an integer number (110605501060497).

Almost surely, 2^{221211002120993} is an apocalyptic number.

It is an amenable number.

221211002120993 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211002120993 is an equidigital number, since it uses as much as digits as its factorization.

221211002120993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 221211002120993 in words is "two hundred twenty-one trillion, two hundred eleven billion, two million, one hundred twenty thousand, nine hundred ninety-three".