1222311031 has 4 divisors (see below), whose sum is σ = 1222391464. Its totient is φ = 1222230600.

The previous prime is 1222311029. The next prime is 1222311047. The reversal of 1222311031 is 1301132221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1222311031 - 2¹ = 1222311029 is a prime.

It is a super-2 number, since 2×1222311031² = 2988088513008565922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222310996 and 1222311014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222311061) 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, 9705 + ... + 50386.

It is an arithmetic number, because the mean of its divisors is an integer number (305597866).

Almost surely, 2^1222311031 is an apocalyptic number.

1222311031 is a deficient number, since it is larger than the sum of its proper divisors (80433).

1222311031 is an equidigital number, since it uses as much as digits as its factorization.

1222311031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80432.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1222311031 is about 34961.5650536414. The cubic root of 1222311031 is about 1069.2040054808.

Adding to 1222311031 its reverse (1301132221), we get a palindrome (2523443252).

The spelling of 1222311031 in words is "one billion, two hundred twenty-two million, three hundred eleven thousand, thirty-one".