1220232031 has 4 divisors (see below), whose sum is σ = 1222130392. Its totient is φ = 1218333672.

The previous prime is 1220232017. The next prime is 1220232047. The reversal of 1220232031 is 1302320221.

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 1220232031 - 2¹³ = 1220223839 is a prime.

It is a super-2 number, since 2×1220232031² = 2977932418956769922, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 1220231996 and 1220232014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220232071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 948216 + ... + 949501.

It is an arithmetic number, because the mean of its divisors is an integer number (305532598).

Almost surely, 2^1220232031 is an apocalyptic number.

1220232031 is a deficient number, since it is larger than the sum of its proper divisors (1898361).

1220232031 is an equidigital number, since it uses as much as digits as its factorization.

1220232031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898360.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1220232031 is about 34931.8197493346. The cubic root of 1220232031 is about 1068.5974668444.

Adding to 1220232031 its reverse (1302320221), we get a palindrome (2522552252).

The spelling of 1220232031 in words is "one billion, two hundred twenty million, two hundred thirty-two thousand, thirty-one".