1220123331 has 40 divisors (see below), whose sum is σ = 2085873504. Its totient is φ = 696263040.

The previous prime is 1220123309. The next prime is 1220123341. The reversal of 1220123331 is 1333210221.

It is not a de Polignac number, because 1220123331 - 2¹¹ = 1220121283 is a prime.

It is a super-2 number, since 2×1220123331² = 2977401885701071122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220123341) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 823111 + ... + 824591.

Almost surely, 2^1220123331 is an apocalyptic number.

1220123331 is a deficient number, since it is larger than the sum of its proper divisors (865750173).

1220123331 is a wasteful number, since it uses less digits than its factorization.

1220123331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2953 (or 2944 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1220123331 is about 34930.2638266590. The cubic root of 1220123331 is about 1068.5657351761.

Adding to 1220123331 its reverse (1333210221), we get a palindrome (2553333552).

The spelling of 1220123331 in words is "one billion, two hundred twenty million, one hundred twenty-three thousand, three hundred thirty-one".