2221911117 has 12 divisors (see below), whose sum is σ = 3220852284. Its totient is φ = 1476000960.

The previous prime is 2221911059. The next prime is 2221911127. The reversal of 2221911117 is 7111191222.

2221911117 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 533194281 + 1688716836 = 23091^2 + 41094^2 .

It is not a de Polignac number, because 2221911117 - 2²⁶ = 2154802253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221911127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 436758 + ... + 441815.

It is an arithmetic number, because the mean of its divisors is an integer number (268404357).

Almost surely, 2^2221911117 is an apocalyptic number.

It is an amenable number.

2221911117 is a deficient number, since it is larger than the sum of its proper divisors (998941167).

2221911117 is a wasteful number, since it uses less digits than its factorization.

2221911117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878860 (or 878857 counting only the distinct ones).

The product of its digits is 504, while the sum is 27.

The square root of 2221911117 is about 47137.1521944209. The cubic root of 2221911117 is about 1304.8949807592.

The spelling of 2221911117 in words is "two billion, two hundred twenty-one million, nine hundred eleven thousand, one hundred seventeen".