1321212111203 has 8 divisors (see below), whose sum is σ = 1391886777600. Its totient is φ = 1250651163528.

The previous prime is 1321212111187. The next prime is 1321212111217. The reversal of 1321212111203 is 3021112121231.

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 1321212111203 - 2⁴ = 1321212111187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321212111223) 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, 28405823 + ... + 28452296.

It is an arithmetic number, because the mean of its divisors is an integer number (173985847200).

Almost surely, 2^{1321212111203} is an apocalyptic number.

1321212111203 is a deficient number, since it is larger than the sum of its proper divisors (70674666397).

1321212111203 is a wasteful number, since it uses less digits than its factorization.

1321212111203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56859361.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1321212111203 its reverse (3021112121231), we get a palindrome (4342324232434).

The spelling of 1321212111203 in words is "one trillion, three hundred twenty-one billion, two hundred twelve million, one hundred eleven thousand, two hundred three".