1225624265221 has 8 divisors (see below), whose sum is σ = 1297732840344. Its totient is φ = 1153517137920.

The previous prime is 1225624265219. The next prime is 1225624265273.

1225624265221 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 230614596 + 1225393650625 = 15186^2 + 1106975^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1225624265221 - 2¹ = 1225624265219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225624265321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1724631 + ... + 2329291.

It is an arithmetic number, because the mean of its divisors is an integer number (162216605043).

Almost surely, 2^{1225624265221} is an apocalyptic number.

It is an amenable number.

1225624265221 is a deficient number, since it is larger than the sum of its proper divisors (72108575123).

1225624265221 is a wasteful number, since it uses less digits than its factorization.

1225624265221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723911.

The product of its digits is 230400, while the sum is 40.

The spelling of 1225624265221 in words is "one trillion, two hundred twenty-five billion, six hundred twenty-four million, two hundred sixty-five thousand, two hundred twenty-one".