1225021052245 has 4 divisors (see below), whose sum is σ = 1470025262700. Its totient is φ = 980016841792.

The previous prime is 1225021052173. The next prime is 1225021052257. The reversal of 1225021052245 is 5422501205221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 754773475729 + 470247576516 = 868777^2 + 685746^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225021052245 - 2¹⁵ = 1225021019477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122502105220 + ... + 122502105229.

It is an arithmetic number, because the mean of its divisors is an integer number (367506315675).

Almost surely, 2^{1225021052245} is an apocalyptic number.

It is an amenable number.

1225021052245 is a deficient number, since it is larger than the sum of its proper divisors (245004210455).

1225021052245 is an equidigital number, since it uses as much as digits as its factorization.

1225021052245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245004210454.

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 1225021052245 its reverse (5422501205221), we get a palindrome (6647522257466).

The spelling of 1225021052245 in words is "one trillion, two hundred twenty-five billion, twenty-one million, fifty-two thousand, two hundred forty-five".