1201111221203 has 4 divisors (see below), whose sum is σ = 1203557476728. Its totient is φ = 1198664965680.

The previous prime is 1201111221151. The next prime is 1201111221221. The reversal of 1201111221203 is 3021221111021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1201111221203 - 2²⁴ = 1201094443987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201111221263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1223127026 + ... + 1223128007.

It is an arithmetic number, because the mean of its divisors is an integer number (300889369182).

Almost surely, 2^{1201111221203} is an apocalyptic number.

1201111221203 is a deficient number, since it is larger than the sum of its proper divisors (2446255525).

1201111221203 is an equidigital number, since it uses as much as digits as its factorization.

1201111221203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446255524.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1201111221203 its reverse (3021221111021), we get a palindrome (4222332332224).

The spelling of 1201111221203 in words is "one trillion, two hundred one billion, one hundred eleven million, two hundred twenty-one thousand, two hundred three".