1220111111413 has 4 divisors (see below), whose sum is σ = 1223731619500. Its totient is φ = 1216490603328.

The previous prime is 1220111111383. The next prime is 1220111111423. The reversal of 1220111111413 is 3141111110221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 591948661924 + 628162449489 = 769382^2 + 792567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220111111413 is a prime.

It is a super-2 number, since 2×1220111111413² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220111111423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1810253538 + ... + 1810254211.

It is an arithmetic number, because the mean of its divisors is an integer number (305932904875).

Almost surely, 2^{1220111111413} is an apocalyptic number.

It is an amenable number.

1220111111413 is a deficient number, since it is larger than the sum of its proper divisors (3620508087).

1220111111413 is an equidigital number, since it uses as much as digits as its factorization.

1220111111413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620508086.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 1220111111413 its reverse (3141111110221), we get a palindrome (4361222221634).

The spelling of 1220111111413 in words is "one trillion, two hundred twenty billion, one hundred eleven million, one hundred eleven thousand, four hundred thirteen".