20122210105 has 16 divisors (see below), whose sum is σ = 24479020944. Its totient is φ = 15877324800.

The previous prime is 20122210099. The next prime is 20122210109. The reversal of 20122210105 is 50101222102.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5176658601 + 14945551504 = 71949^2 + 122252^2 .

It is not a de Polignac number, because 20122210105 - 2¹⁵ = 20122177337 is a prime.

It is a super-2 number, since 2×20122210105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20122210109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71305 + ... + 212905.

It is an arithmetic number, because the mean of its divisors is an integer number (1529938809).

Almost surely, 2^20122210105 is an apocalyptic number.

It is an amenable number.

20122210105 is a deficient number, since it is larger than the sum of its proper divisors (4356810839).

20122210105 is a wasteful number, since it uses less digits than its factorization.

20122210105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141996.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 20122210105 its reverse (50101222102), we get a palindrome (70223432207).

The spelling of 20122210105 in words is "twenty billion, one hundred twenty-two million, two hundred ten thousand, one hundred five".