1212031001321 has 8 divisors (see below), whose sum is σ = 1385259395520. Its totient is φ = 1038822884208.

The previous prime is 1212031001317. The next prime is 1212031001333. The reversal of 1212031001321 is 1231001302121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212031001321 - 2² = 1212031001317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212031001321.

It is not an unprimeable number, because it can be changed into a prime (1212031001341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4940966 + ... + 5180463.

It is an arithmetic number, because the mean of its divisors is an integer number (173157424440).

Almost surely, 2^{1212031001321} is an apocalyptic number.

It is an amenable number.

1212031001321 is a deficient number, since it is larger than the sum of its proper divisors (173228394199).

1212031001321 is a wasteful number, since it uses less digits than its factorization.

1212031001321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10138543.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1212031001321 its reverse (1231001302121), we get a palindrome (2443032303442).

The spelling of 1212031001321 in words is "one trillion, two hundred twelve billion, thirty-one million, one thousand, three hundred twenty-one".