20101204225 has 6 divisors (see below), whose sum is σ = 24925493270. Its totient is φ = 16080963360.

The previous prime is 20101204213. The next prime is 20101204247. The reversal of 20101204225 is 52240210102.

It can be written as a sum of positive squares in 3 ways, for example, as 2455004304 + 17646199921 = 49548^2 + 132839^2 .

It is not a de Polignac number, because 20101204225 - 2¹⁵ = 20101171457 is a prime.

It is a super-2 number, since 2×20101204225² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 402024060 + ... + 402024109.

Almost surely, 2^20101204225 is an apocalyptic number.

20101204225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20101204225 is a deficient number, since it is larger than the sum of its proper divisors (4824289045).

20101204225 is an equidigital number, since it uses as much as digits as its factorization.

20101204225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804048179 (or 804048174 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 20101204225 its reverse (52240210102), we get a palindrome (72341414327).

The spelling of 20101204225 in words is "twenty billion, one hundred one million, two hundred four thousand, two hundred twenty-five".