1221860183 has 2 divisors, whose sum is σ = 1221860184. Its totient is φ = 1221860182.

The previous prime is 1221860149. The next prime is 1221860191. The reversal of 1221860183 is 3810681221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221860183 - 2⁸ = 1221859927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221860083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610930091 + 610930092.

It is an arithmetic number, because the mean of its divisors is an integer number (610930092).

Almost surely, 2^1221860183 is an apocalyptic number.

1221860183 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221860183 is an equidigital number, since it uses as much as digits as its factorization.

1221860183 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1221860183 is about 34955.1166926961. The cubic root of 1221860183 is about 1069.0725310975.

The spelling of 1221860183 in words is "one billion, two hundred twenty-one million, eight hundred sixty thousand, one hundred eighty-three".