22001100025 has 12 divisors (see below), whose sum is σ = 28018699372. Its totient is φ = 17125179840.

The previous prime is 22001099987. The next prime is 22001100029. The reversal of 22001100025 is 52000110022.

It can be written as a sum of positive squares in 6 ways, for example, as 508367209 + 21492732816 = 22547^2 + 146604^2 .

It is not a de Polignac number, because 22001100025 - 2¹¹ = 22001097977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22001099978 and 22001100014.

It is not an unprimeable number, because it can be changed into a prime (22001100029) 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, 11891562 + ... + 11893411.

Almost surely, 2^22001100025 is an apocalyptic number.

22001100025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22001100025 is a deficient number, since it is larger than the sum of its proper divisors (6017599347).

22001100025 is a wasteful number, since it uses less digits than its factorization.

22001100025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23785020 (or 23785015 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

Adding to 22001100025 its reverse (52000110022), we get a palindrome (74001210047).

The spelling of 22001100025 in words is "twenty-two billion, one million, one hundred thousand, twenty-five".