1331203013 has 4 divisors (see below), whose sum is σ = 1521374880. Its totient is φ = 1141031148.

The previous prime is 1331202997. The next prime is 1331203033. The reversal of 1331203013 is 3103021331.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3103021331 = 1511 ⋅2053621.

It is a cyclic number.

It is not a de Polignac number, because 1331203013 - 2⁴ = 1331202997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331202982 and 1331203000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331203033) 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, 95085923 + ... + 95085936.

It is an arithmetic number, because the mean of its divisors is an integer number (380343720).

Almost surely, 2^1331203013 is an apocalyptic number.

It is an amenable number.

1331203013 is a deficient number, since it is larger than the sum of its proper divisors (190171867).

1331203013 is an equidigital number, since it uses as much as digits as its factorization.

1331203013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190171866.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 1331203013 is about 36485.6548933961. The cubic root of 1331203013 is about 1100.0559236031.

Adding to 1331203013 its reverse (3103021331), we get a palindrome (4434224344).

The spelling of 1331203013 in words is "one billion, three hundred thirty-one million, two hundred three thousand, thirteen".