1210200021321 has 4 divisors (see below), whose sum is σ = 1613600028432. Its totient is φ = 806800014212.

The previous prime is 1210200021319. The next prime is 1210200021341. The reversal of 1210200021321 is 1231200020121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1210200021321 - 2¹ = 1210200021319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1210200021321.

It is not an unprimeable number, because it can be changed into a prime (1210200021341) 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 3 ways as a sum of consecutive naturals, for example, 201700003551 + ... + 201700003556.

It is an arithmetic number, because the mean of its divisors is an integer number (403400007108).

Almost surely, 2^{1210200021321} is an apocalyptic number.

It is an amenable number.

1210200021321 is a deficient number, since it is larger than the sum of its proper divisors (403400007111).

1210200021321 is an equidigital number, since it uses as much as digits as its factorization.

1210200021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403400007110.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1210200021321 its reverse (1231200020121), we get a palindrome (2441400041442).

The spelling of 1210200021321 in words is "one trillion, two hundred ten billion, two hundred million, twenty-one thousand, three hundred twenty-one".