221002109953 has 2 divisors, whose sum is σ = 221002109954. Its totient is φ = 221002109952.

The previous prime is 221002109941. The next prime is 221002110053. The reversal of 221002109953 is 359901200122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201472606449 + 19529503504 = 448857^2 + 139748^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221002109953 is a prime.

It is not a weakly prime, because it can be changed into another prime (221002109453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501054976 + 110501054977.

It is an arithmetic number, because the mean of its divisors is an integer number (110501054977).

Almost surely, 2^221002109953 is an apocalyptic number.

It is an amenable number.

221002109953 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002109953 is an equidigital number, since it uses as much as digits as its factorization.

221002109953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The spelling of 221002109953 in words is "two hundred twenty-one billion, two million, one hundred nine thousand, nine hundred fifty-three".