1220011344431 has 16 divisors (see below), whose sum is σ = 1388838140928. Its totient is φ = 1060840836000.

The previous prime is 1220011344403. The next prime is 1220011344493. The reversal of 1220011344431 is 1344431100221.

It is not a de Polignac number, because 1220011344431 - 2¹⁰ = 1220011343407 is a prime.

It is a super-2 number, since 2×1220011344431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220011344431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220011344931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8563481 + ... + 8704781.

It is an arithmetic number, because the mean of its divisors is an integer number (86802383808).

Almost surely, 2^{1220011344431} is an apocalyptic number.

1220011344431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220011344431 is a deficient number, since it is larger than the sum of its proper divisors (168826796497).

1220011344431 is a wasteful number, since it uses less digits than its factorization.

1220011344431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175462.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 1220011344431 its reverse (1344431100221), we get a palindrome (2564442444652).

The spelling of 1220011344431 in words is "one trillion, two hundred twenty billion, eleven million, three hundred forty-four thousand, four hundred thirty-one".