1220310031231 has 16 divisors (see below), whose sum is σ = 1289501215200. Its totient is φ = 1151622033408.

The previous prime is 1220310031223. The next prime is 1220310031243. The reversal of 1220310031231 is 1321300130221.

It is a cyclic number.

It is not a de Polignac number, because 1220310031231 - 2³ = 1220310031223 is a prime.

It is a super-2 number, since 2×1220310031231² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220310031199 and 1220310031208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220310031531) 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, 6459625 + ... + 6645853.

It is an arithmetic number, because the mean of its divisors is an integer number (80593825950).

Almost surely, 2^{1220310031231} is an apocalyptic number.

1220310031231 is a deficient number, since it is larger than the sum of its proper divisors (69191183969).

1220310031231 is a wasteful number, since it uses less digits than its factorization.

1220310031231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187578.

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

Adding to 1220310031231 its reverse (1321300130221), we get a palindrome (2541610161452).

The spelling of 1220310031231 in words is "one trillion, two hundred twenty billion, three hundred ten million, thirty-one thousand, two hundred thirty-one".