2221112501 has 2 divisors, whose sum is σ = 2221112502. Its totient is φ = 2221112500.

The previous prime is 2221112473. The next prime is 2221112503. The reversal of 2221112501 is 1052111222.

2221112501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2065611601 + 155500900 = 45449^2 + 12470^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221112501 - 2²⁶ = 2154003637 is a prime.

Together with 2221112503, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2221112501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221112503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110556250 + 1110556251.

It is an arithmetic number, because the mean of its divisors is an integer number (1110556251).

Almost surely, 2^2221112501 is an apocalyptic number.

It is an amenable number.

2221112501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221112501 is an equidigital number, since it uses as much as digits as its factorization.

2221112501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 2221112501 is about 47128.6802382583. The cubic root of 2221112501 is about 1304.7386236363.

Adding to 2221112501 its reverse (1052111222), we get a palindrome (3273223723).

The spelling of 2221112501 in words is "two billion, two hundred twenty-one million, one hundred twelve thousand, five hundred one".