1220113442431 has 16 divisors (see below), whose sum is σ = 1342710061056. Its totient is φ = 1101886274016.

The previous prime is 1220113442399. The next prime is 1220113442477. The reversal of 1220113442431 is 1342443110221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1220113442431 - 2⁵ = 1220113442399 is a prime.

It is a super-2 number, since 2×1220113442431² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220113442431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220113440431) 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, 5378095 + ... + 5600368.

It is an arithmetic number, because the mean of its divisors is an integer number (83919378816).

Almost surely, 2^{1220113442431} is an apocalyptic number.

1220113442431 is a deficient number, since it is larger than the sum of its proper divisors (122596618625).

1220113442431 is a wasteful number, since it uses less digits than its factorization.

1220113442431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10978662.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 1220113442431 its reverse (1342443110221), we get a palindrome (2562556552652).

The spelling of 1220113442431 in words is "one trillion, two hundred twenty billion, one hundred thirteen million, four hundred forty-two thousand, four hundred thirty-one".