1231321413 has 32 divisors (see below), whose sum is σ = 1908264960. Its totient is φ = 691704000.

The previous prime is 1231321381. The next prime is 1231321451. The reversal of 1231321413 is 3141231321.

It is not a de Polignac number, because 1231321413 - 2⁵ = 1231321381 is a prime.

It is a super-3 number, since 3×1231321413³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1231321413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231321213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 414931 + ... + 417887.

It is an arithmetic number, because the mean of its divisors is an integer number (59633280).

Almost surely, 2^1231321413 is an apocalyptic number.

It is an amenable number.

1231321413 is a deficient number, since it is larger than the sum of its proper divisors (676943547).

1231321413 is a wasteful number, since it uses less digits than its factorization.

1231321413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297.

The product of its digits is 432, while the sum is 21.

The square root of 1231321413 is about 35090.1896974069. The cubic root of 1231321413 is about 1071.8248224582.

Adding to 1231321413 its reverse (3141231321), we get a palindrome (4372552734).

The spelling of 1231321413 in words is "one billion, two hundred thirty-one million, three hundred twenty-one thousand, four hundred thirteen".