221001211210993 has 2 divisors, whose sum is σ = 221001211210994. Its totient is φ = 221001211210992.

The previous prime is 221001211210981. The next prime is 221001211211041. The reversal of 221001211210993 is 399012112100122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219289687915489 + 1711523295504 = 14808433^2 + 1308252^2 .

It is a cyclic number.

It is not a de Polignac number, because 221001211210993 - 2³⁷ = 220863772257521 is a prime.

It is not a weakly prime, because it can be changed into another prime (221001211216993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500605605496 + 110500605605497.

It is an arithmetic number, because the mean of its divisors is an integer number (110500605605497).

Almost surely, 2^{221001211210993} is an apocalyptic number.

It is an amenable number.

221001211210993 is a deficient number, since it is larger than the sum of its proper divisors (1).

221001211210993 is an equidigital number, since it uses as much as digits as its factorization.

221001211210993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 221001211210993 in words is "two hundred twenty-one trillion, one billion, two hundred eleven million, two hundred ten thousand, nine hundred ninety-three".