221253996919 has 2 divisors, whose sum is σ = 221253996920. Its totient is φ = 221253996918.

The previous prime is 221253996893. The next prime is 221253996967. The reversal of 221253996919 is 919699352122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221253996919 - 2⁷ = 221253996791 is a prime.

It is a super-2 number, since 2×221253996919² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221253996989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110626998459 + 110626998460.

It is an arithmetic number, because the mean of its divisors is an integer number (110626998460).

Almost surely, 2^221253996919 is an apocalyptic number.

221253996919 is a deficient number, since it is larger than the sum of its proper divisors (1).

221253996919 is an equidigital number, since it uses as much as digits as its factorization.

221253996919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4723920, while the sum is 58.

The spelling of 221253996919 in words is "two hundred twenty-one billion, two hundred fifty-three million, nine hundred ninety-six thousand, nine hundred nineteen".