221223131893 has 2 divisors, whose sum is σ = 221223131894. Its totient is φ = 221223131892.

The previous prime is 221223131887. The next prime is 221223131929. The reversal of 221223131893 is 398131322122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161605608004 + 59617523889 = 402002^2 + 244167^2 .

It is a cyclic number.

It is not a de Polignac number, because 221223131893 - 2²⁹ = 220686260981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221223131873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110611565946 + 110611565947.

It is an arithmetic number, because the mean of its divisors is an integer number (110611565947).

Almost surely, 2^221223131893 is an apocalyptic number.

It is an amenable number.

221223131893 is a deficient number, since it is larger than the sum of its proper divisors (1).

221223131893 is an equidigital number, since it uses as much as digits as its factorization.

221223131893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The spelling of 221223131893 in words is "two hundred twenty-one billion, two hundred twenty-three million, one hundred thirty-one thousand, eight hundred ninety-three".