1201321203 has 4 divisors (see below), whose sum is σ = 1601761608. Its totient is φ = 800880800.

The previous prime is 1201321181. The next prime is 1201321223. The reversal of 1201321203 is 3021231021.

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 1201321203 - 2⁵ = 1201321171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201321223) 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, 200220198 + ... + 200220203.

It is an arithmetic number, because the mean of its divisors is an integer number (400440402).

Almost surely, 2^1201321203 is an apocalyptic number.

1201321203 is a deficient number, since it is larger than the sum of its proper divisors (400440405).

1201321203 is an equidigital number, since it uses as much as digits as its factorization.

1201321203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400440404.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1201321203 is about 34660.0808279496. The cubic root of 1201321203 is about 1063.0484227215.

Adding to 1201321203 its reverse (3021231021), we get a palindrome (4222552224).

The spelling of 1201321203 in words is "one billion, two hundred one million, three hundred twenty-one thousand, two hundred three".