1220013211013 has 4 divisors (see below), whose sum is σ = 1220015624940. Its totient is φ = 1220010797088.

The previous prime is 1220013210961. The next prime is 1220013211033. The reversal of 1220013211013 is 3101123100221.

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 392819323009 + 827193888004 = 626753^2 + 909502^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220013211013 - 2²⁶ = 1219946102149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1220013210982 and 1220013211000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220013211033) 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 3 ways as a sum of consecutive naturals, for example, 126368 + ... + 1567161.

It is an arithmetic number, because the mean of its divisors is an integer number (305003906235).

Almost surely, 2^{1220013211013} is an apocalyptic number.

It is an amenable number.

1220013211013 is a deficient number, since it is larger than the sum of its proper divisors (2413927).

1220013211013 is an equidigital number, since it uses as much as digits as its factorization.

1220013211013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413926.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1220013211013 its reverse (3101123100221), we get a palindrome (4321136311234).

The spelling of 1220013211013 in words is "one trillion, two hundred twenty billion, thirteen million, two hundred eleven thousand, thirteen".