1203331243021 has 4 divisors (see below), whose sum is σ = 1204741948732. Its totient is φ = 1201920537312.

The previous prime is 1203331243013. The next prime is 1203331243091. The reversal of 1203331243021 is 1203421333021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 282719777796 + 920611465225 = 531714^2 + 959485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203331243021 - 2³ = 1203331243013 is a prime.

It is a super-2 number, since 2×1203331243021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203331243091) 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, 705351576 + ... + 705353281.

It is an arithmetic number, because the mean of its divisors is an integer number (301185487183).

Almost surely, 2^{1203331243021} is an apocalyptic number.

It is an amenable number.

1203331243021 is a deficient number, since it is larger than the sum of its proper divisors (1410705711).

1203331243021 is an equidigital number, since it uses as much as digits as its factorization.

1203331243021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410705710.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1203331243021 its reverse (1203421333021), we get a palindrome (2406752576042).

The spelling of 1203331243021 in words is "one trillion, two hundred three billion, three hundred thirty-one million, two hundred forty-three thousand, twenty-one".