1220554325345 has 16 divisors (see below), whose sum is σ = 1493619765120. Its totient is φ = 957300603264.

The previous prime is 1220554325339. The next prime is 1220554325381. The reversal of 1220554325345 is 5435234550221.

It is a cyclic number.

It is not a de Polignac number, because 1220554325345 - 2⁶ = 1220554325281 is a prime.

It is a super-2 number, since 2×1220554325345² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9950975 + ... + 10072884.

It is an arithmetic number, because the mean of its divisors is an integer number (93351235320).

Almost surely, 2^{1220554325345} is an apocalyptic number.

It is an amenable number.

1220554325345 is a deficient number, since it is larger than the sum of its proper divisors (273065439775).

1220554325345 is a wasteful number, since it uses less digits than its factorization.

1220554325345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20024104.

The product of its (nonzero) digits is 720000, while the sum is 41.

Adding to 1220554325345 its reverse (5435234550221), we get a palindrome (6655788875566).

The spelling of 1220554325345 in words is "one trillion, two hundred twenty billion, five hundred fifty-four million, three hundred twenty-five thousand, three hundred forty-five".