1203111013 has 8 divisors (see below), whose sum is σ = 1296060248. Its totient is φ = 1110219264.

The previous prime is 1203110999. The next prime is 1203111017. The reversal of 1203111013 is 3101113021.

It can be written as a sum of positive squares in 4 ways, for example, as 91355364 + 1111755649 = 9558^2 + 33343^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1203111013 is a prime.

It is a super-2 number, since 2×1203111013² = 2894952219203772338, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1203110984 and 1203111002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203111017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35545 + ... + 60577.

It is an arithmetic number, because the mean of its divisors is an integer number (162007531).

Almost surely, 2^1203111013 is an apocalyptic number.

1203111013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1203111013 is a deficient number, since it is larger than the sum of its proper divisors (92949235).

1203111013 is a wasteful number, since it uses less digits than its factorization.

1203111013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28743.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1203111013 is about 34685.8906905964. The cubic root of 1203111013 is about 1063.5760946915.

Adding to 1203111013 its reverse (3101113021), we get a palindrome (4304224034).

The spelling of 1203111013 in words is "one billion, two hundred three million, one hundred eleven thousand, thirteen".