1220003311231 has 4 divisors (see below), whose sum is σ = 1235446391200. Its totient is φ = 1204560231264.

The previous prime is 1220003311199. The next prime is 1220003311369. The reversal of 1220003311231 is 1321133000221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220003311231 - 2⁵ = 1220003311199 is a prime.

It is a super-2 number, since 2×1220003311231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220003311199 and 1220003311208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220003311931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7721539866 + ... + 7721540023.

It is an arithmetic number, because the mean of its divisors is an integer number (308861597800).

Almost surely, 2^{1220003311231} is an apocalyptic number.

1220003311231 is a deficient number, since it is larger than the sum of its proper divisors (15443079969).

1220003311231 is an equidigital number, since it uses as much as digits as its factorization.

1220003311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15443079968.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1220003311231 its reverse (1321133000221), we get a palindrome (2541136311452).

The spelling of 1220003311231 in words is "one trillion, two hundred twenty billion, three million, three hundred eleven thousand, two hundred thirty-one".