221214043 has 2 divisors, whose sum is σ = 221214044. Its totient is φ = 221214042.

The previous prime is 221213987. The next prime is 221214053. The reversal of 221214043 is 340412122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221214043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221214043.

It is not a weakly prime, because it can be changed into another prime (221214053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110607021 + 110607022.

It is an arithmetic number, because the mean of its divisors is an integer number (110607022).

Almost surely, 2^221214043 is an apocalyptic number.

221214043 is a deficient number, since it is larger than the sum of its proper divisors (1).

221214043 is an equidigital number, since it uses as much as digits as its factorization.

221214043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 221214043 is about 14873.2660501989. The cubic root of 221214043 is about 604.7894839368.

Adding to 221214043 its reverse (340412122), we get a palindrome (561626165).

The spelling of 221214043 in words is "two hundred twenty-one million, two hundred fourteen thousand, forty-three".