2221010109 has 12 divisors (see below), whose sum is σ = 3210480156. Its totient is φ = 1479586752.

The previous prime is 2221010107. The next prime is 2221010131. The reversal of 2221010109 is 9010101222.

2221010109 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 2024730009 + 196280100 = 44997^2 + 14010^2 .

It is not a de Polignac number, because 2221010109 - 2¹ = 2221010107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221010091 and 2221010100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221010107) 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, 77512 + ... + 102225.

It is an arithmetic number, because the mean of its divisors is an integer number (267540013).

Almost surely, 2^2221010109 is an apocalyptic number.

It is an amenable number.

2221010109 is a deficient number, since it is larger than the sum of its proper divisors (989470047).

2221010109 is a wasteful number, since it uses less digits than its factorization.

2221010109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181116 (or 181113 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 2221010109 is about 47127.5939233057. The cubic root of 2221010109 is about 1304.7185740965.

It can be divided in two parts, 222 and 1010109, that added together give a triangular number (1010331 = T₁₄₂₁).

The spelling of 2221010109 in words is "two billion, two hundred twenty-one million, ten thousand, one hundred nine".