221621119 has 2 divisors, whose sum is σ = 221621120. Its totient is φ = 221621118.

The previous prime is 221621093. The next prime is 221621177. The reversal of 221621119 is 911126122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221621119 - 2⁵ = 221621087 is a prime.

It is a super-2 number, since 2×221621119² = 98231840773624322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221621093 and 221621102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221621819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110810559 + 110810560.

It is an arithmetic number, because the mean of its divisors is an integer number (110810560).

Almost surely, 2^221621119 is an apocalyptic number.

221621119 is a deficient number, since it is larger than the sum of its proper divisors (1).

221621119 is an equidigital number, since it uses as much as digits as its factorization.

221621119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 25.

The square root of 221621119 is about 14886.9445824185. The cubic root of 221621119 is about 605.1602325858.

The spelling of 221621119 in words is "two hundred twenty-one million, six hundred twenty-one thousand, one hundred nineteen".