1011320203 has 4 divisors (see below), whose sum is σ = 1020598480. Its totient is φ = 1002041928.

The previous prime is 1011320183. The next prime is 1011320207. The reversal of 1011320203 is 3020231101.

1011320203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3020231101 = 17 ⋅177660653.

It is a cyclic number.

It is not a de Polignac number, because 1011320203 - 2¹³ = 1011312011 is a prime.

It is a super-2 number, since 2×1011320203² = 2045537105991922418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011320207) 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, 4638975 + ... + 4639192.

It is an arithmetic number, because the mean of its divisors is an integer number (255149620).

Almost surely, 2^1011320203 is an apocalyptic number.

1011320203 is a deficient number, since it is larger than the sum of its proper divisors (9278277).

1011320203 is an equidigital number, since it uses as much as digits as its factorization.

1011320203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9278276.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1011320203 is about 31801.2610284561. The cubic root of 1011320203 is about 1003.7592513210.

Adding to 1011320203 its reverse (3020231101), we get a palindrome (4031551304).

The spelling of 1011320203 in words is "one billion, eleven million, three hundred twenty thousand, two hundred three".