1220420110431 has 16 divisors (see below), whose sum is σ = 1650399345504. Its totient is φ = 802092417024.

The previous prime is 1220420110423. The next prime is 1220420110453. The reversal of 1220420110431 is 1340110240221.

It is not a de Polignac number, because 1220420110431 - 2³ = 1220420110423 is a prime.

It is a super-2 number, since 2×1220420110431² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220420110398 and 1220420110407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220420510431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8084520 + ... + 8234093.

It is an arithmetic number, because the mean of its divisors is an integer number (103149959094).

Almost surely, 2^{1220420110431} is an apocalyptic number.

1220420110431 is a deficient number, since it is larger than the sum of its proper divisors (429979235073).

1220420110431 is a wasteful number, since it uses less digits than its factorization.

1220420110431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16318970.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1220420110431 its reverse (1340110240221), we get a palindrome (2560530350652).

The spelling of 1220420110431 in words is "one trillion, two hundred twenty billion, four hundred twenty million, one hundred ten thousand, four hundred thirty-one".