1321211023203 has 8 divisors (see below), whose sum is σ = 1761736422400. Its totient is φ = 880746486408.

The previous prime is 1321211023189. The next prime is 1321211023247. The reversal of 1321211023203 is 3023201121231.

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

It is not a de Polignac number, because 1321211023203 - 2²⁶ = 1321143914339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321211023203.

It is not an unprimeable number, because it can be changed into a prime (1321211023273) 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, 15164923 + ... + 15251796.

It is an arithmetic number, because the mean of its divisors is an integer number (220217052800).

Almost surely, 2^{1321211023203} is an apocalyptic number.

1321211023203 is a deficient number, since it is larger than the sum of its proper divisors (440525399197).

1321211023203 is a wasteful number, since it uses less digits than its factorization.

1321211023203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30431201.

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

Adding to 1321211023203 its reverse (3023201121231), we get a palindrome (4344412144434).

The spelling of 1321211023203 in words is "one trillion, three hundred twenty-one billion, two hundred eleven million, twenty-three thousand, two hundred three".