1212431001321 has 16 divisors (see below), whose sum is σ = 1618907276160. Its totient is φ = 807121244160.

The previous prime is 1212431001293. The next prime is 1212431001347. The reversal of 1212431001321 is 1231001342121.

It is not a de Polignac number, because 1212431001321 - 2⁵ = 1212431001289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212431001361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31367235 + ... + 31405863.

It is an arithmetic number, because the mean of its divisors is an integer number (101181704760).

Almost surely, 2^{1212431001321} is an apocalyptic number.

It is an amenable number.

1212431001321 is a deficient number, since it is larger than the sum of its proper divisors (406476274839).

1212431001321 is a wasteful number, since it uses less digits than its factorization.

1212431001321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53456.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1212431001321 its reverse (1231001342121), we get a palindrome (2443432343442).

The spelling of 1212431001321 in words is "one trillion, two hundred twelve billion, four hundred thirty-one million, one thousand, three hundred twenty-one".