221220212183 has 2 divisors, whose sum is σ = 221220212184. Its totient is φ = 221220212182.

The previous prime is 221220212173. The next prime is 221220212201. The reversal of 221220212183 is 381212022122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221220212183 - 2⁶ = 221220212119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221220212113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610106091 + 110610106092.

It is an arithmetic number, because the mean of its divisors is an integer number (110610106092).

Almost surely, 2^221220212183 is an apocalyptic number.

221220212183 is a deficient number, since it is larger than the sum of its proper divisors (1).

221220212183 is an equidigital number, since it uses as much as digits as its factorization.

221220212183 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

The spelling of 221220212183 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, one hundred eighty-three".