1331203300021 has 4 divisors (see below), whose sum is σ = 1521375200032. Its totient is φ = 1141031400012.

The previous prime is 1331203300003. The next prime is 1331203300067. The reversal of 1331203300021 is 1200033021331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1331203300021 - 2⁹ = 1331203299509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331203300081) 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, 95085949995 + ... + 95085950008.

It is an arithmetic number, because the mean of its divisors is an integer number (380343800008).

Almost surely, 2^{1331203300021} is an apocalyptic number.

It is an amenable number.

1331203300021 is a deficient number, since it is larger than the sum of its proper divisors (190171900011).

1331203300021 is an equidigital number, since it uses as much as digits as its factorization.

1331203300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190171900010.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 1331203300021 its reverse (1200033021331), we get a palindrome (2531236321352).

The spelling of 1331203300021 in words is "one trillion, three hundred thirty-one billion, two hundred three million, three hundred thousand, twenty-one".