1200312021203 has 4 divisors (see below), whose sum is σ = 1200457857648. Its totient is φ = 1200166184760.

The previous prime is 1200312021179. The next prime is 1200312021217. The reversal of 1200312021203 is 3021202130021.

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 1200312021203 - 2¹⁰ = 1200312020179 is a prime.

It is a super-2 number, since 2×1200312021203² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200312021263) 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, 72905876 + ... + 72922337.

It is an arithmetic number, because the mean of its divisors is an integer number (300114464412).

Almost surely, 2^{1200312021203} is an apocalyptic number.

1200312021203 is a deficient number, since it is larger than the sum of its proper divisors (145836445).

1200312021203 is an equidigital number, since it uses as much as digits as its factorization.

1200312021203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145836444.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1200312021203 its reverse (3021202130021), we get a palindrome (4221514151224).

The spelling of 1200312021203 in words is "one trillion, two hundred billion, three hundred twelve million, twenty-one thousand, two hundred three".