1321123252 has 12 divisors (see below), whose sum is σ = 2315829600. Its totient is φ = 659457656.

The previous prime is 1321123247. The next prime is 1321123253. The reversal of 1321123252 is 2523211231.

It is a super-3 number, since 3×1321123252³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321123253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273298 + ... + 278089.

It is an arithmetic number, because the mean of its divisors is an integer number (192985800).

Almost surely, 2^1321123252 is an apocalyptic number.

It is an amenable number.

1321123252 is a deficient number, since it is larger than the sum of its proper divisors (994706348).

1321123252 is a wasteful number, since it uses less digits than its factorization.

1321123252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551990 (or 551988 counting only the distinct ones).

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

The square root of 1321123252 is about 36347.2592089142. The cubic root of 1321123252 is about 1097.2723747917.

Adding to 1321123252 its reverse (2523211231), we get a palindrome (3844334483).

It can be divided in two parts, 13211 and 23252, that added together give a palindrome (36463).

The spelling of 1321123252 in words is "one billion, three hundred twenty-one million, one hundred twenty-three thousand, two hundred fifty-two".