1231532122 has 32 divisors (see below), whose sum is σ = 1981107072. Its totient is φ = 572135424.

The previous prime is 1231532059. The next prime is 1231532123. The reversal of 1231532122 is 2212351321.

It is a junction number, because it is equal to n+sod(n) for n = 1231532093 and 1231532102.

It is not an unprimeable number, because it can be changed into a prime (1231532123) 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, 1829578 + ... + 1830250.

It is an arithmetic number, because the mean of its divisors is an integer number (61909596).

Almost surely, 2^1231532122 is an apocalyptic number.

1231532122 is a deficient number, since it is larger than the sum of its proper divisors (749574950).

1231532122 is a wasteful number, since it uses less digits than its factorization.

1231532122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302.

The product of its digits is 720, while the sum is 22.

The square root of 1231532122 is about 35093.1919608348. The cubic root of 1231532122 is about 1071.8859573910.

Adding to 1231532122 its reverse (2212351321), we get a palindrome (3443883443).

The spelling of 1231532122 in words is "one billion, two hundred thirty-one million, five hundred thirty-two thousand, one hundred twenty-two".