1222320331 has 16 divisors (see below), whose sum is σ = 1325469600. Its totient is φ = 1123372800.

The previous prime is 1222320301. The next prime is 1222320373. The reversal of 1222320331 is 1330232221.

It is a cyclic number.

It is not a de Polignac number, because 1222320331 - 2¹³ = 1222312139 is a prime.

It is a super-2 number, since 2×1222320331² = 2988133983151899122, which 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 = 1222320299 and 1222320308.

It is not an unprimeable number, because it can be changed into a prime (1222320301) 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, 136665 + ... + 145333.

It is an arithmetic number, because the mean of its divisors is an integer number (82841850).

Almost surely, 2^1222320331 is an apocalyptic number.

1222320331 is a deficient number, since it is larger than the sum of its proper divisors (103149269).

1222320331 is a wasteful number, since it uses less digits than its factorization.

1222320331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8910.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1222320331 is about 34961.6980565876. The cubic root of 1222320331 is about 1069.2067171671.

Adding to 1222320331 its reverse (1330232221), we get a palindrome (2552552552).

It can be divided in two parts, 122 and 2320331, that multiplied together give a palindrome (283080382).

The spelling of 1222320331 in words is "one billion, two hundred twenty-two million, three hundred twenty thousand, three hundred thirty-one".