221111983 has 2 divisors, whose sum is σ = 221111984. Its totient is φ = 221111982.

The previous prime is 221111971. The next prime is 221112019. The reversal of 221111983 is 389111122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221111983 - 2¹³ = 221103791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221111183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555991 + 110555992.

It is an arithmetic number, because the mean of its divisors is an integer number (110555992).

Almost surely, 2^221111983 is an apocalyptic number.

221111983 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111983 is an equidigital number, since it uses as much as digits as its factorization.

221111983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 28.

The square root of 221111983 is about 14869.8346661959. The cubic root of 221111983 is about 604.6964604427.

The spelling of 221111983 in words is "two hundred twenty-one million, one hundred eleven thousand, nine hundred eighty-three".