20021110225 has 12 divisors (see below), whose sum is σ = 25140434560. Its totient is φ = 15814141200.

The previous prime is 20021110223. The next prime is 20021110349. The reversal of 20021110225 is 52201112002.

It is a happy number.

It is not a de Polignac number, because 20021110225 - 2¹ = 20021110223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20021110199 and 20021110208.

It is not an unprimeable number, because it can be changed into a prime (20021110223) 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, 5066661 + ... + 5070610.

Almost surely, 2^20021110225 is an apocalyptic number.

20021110225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20021110225 is a deficient number, since it is larger than the sum of its proper divisors (5119324335).

20021110225 is a wasteful number, since it uses less digits than its factorization.

20021110225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10137360 (or 10137355 counting only the distinct ones).

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

Adding to 20021110225 its reverse (52201112002), we get a palindrome (72222222227).

The spelling of 20021110225 in words is "twenty billion, twenty-one million, one hundred ten thousand, two hundred twenty-five".