1225721702225 has 24 divisors (see below), whose sum is σ = 1528606404000. Its totient is φ = 974958631040.

The previous prime is 1225721702221. The next prime is 1225721702239. The reversal of 1225721702225 is 5222071275221.

It is not a de Polignac number, because 1225721702225 - 2² = 1225721702221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1225721702221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40121006 + ... + 40151544.

It is an arithmetic number, because the mean of its divisors is an integer number (63691933500).

Almost surely, 2^{1225721702225} is an apocalyptic number.

It is an amenable number.

1225721702225 is a deficient number, since it is larger than the sum of its proper divisors (302884701775).

1225721702225 is a wasteful number, since it uses less digits than its factorization.

1225721702225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39697 (or 39692 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

Adding to 1225721702225 its reverse (5222071275221), we get a palindrome (6447792977446).

The spelling of 1225721702225 in words is "one trillion, two hundred twenty-five billion, seven hundred twenty-one million, seven hundred two thousand, two hundred twenty-five".