1220432530551 has 32 divisors (see below), whose sum is σ = 1828757908992. Its totient is φ = 718322774400.

The previous prime is 1220432530549. The next prime is 1220432530571. The reversal of 1220432530551 is 1550352340221.

It is not a de Polignac number, because 1220432530551 - 2¹ = 1220432530549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220432530571) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12449076 + ... + 12546726.

It is an arithmetic number, because the mean of its divisors is an integer number (57148684656).

Almost surely, 2^{1220432530551} is an apocalyptic number.

1220432530551 is a deficient number, since it is larger than the sum of its proper divisors (608325378441).

1220432530551 is a wasteful number, since it uses less digits than its factorization.

1220432530551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111623.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 1220432530551 its reverse (1550352340221), we get a palindrome (2770784870772).

The spelling of 1220432530551 in words is "one trillion, two hundred twenty billion, four hundred thirty-two million, five hundred thirty thousand, five hundred fifty-one".