2221111973 has 2 divisors, whose sum is σ = 2221111974. Its totient is φ = 2221111972.

The previous prime is 2221111903. The next prime is 2221111993. The reversal of 2221111973 is 3791111222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2147117569 + 73994404 = 46337^2 + 8602^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221111973 - 2¹⁶ = 2221046437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221111903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110555986 + 1110555987.

It is an arithmetic number, because the mean of its divisors is an integer number (1110555987).

Almost surely, 2^2221111973 is an apocalyptic number.

It is an amenable number.

2221111973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221111973 is an equidigital number, since it uses as much as digits as its factorization.

2221111973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 29.

The square root of 2221111973 is about 47128.6746365734. The cubic root of 2221111973 is about 1304.7385202493.

The spelling of 2221111973 in words is "two billion, two hundred twenty-one million, one hundred eleven thousand, nine hundred seventy-three".