1011205403 has 12 divisors (see below), whose sum is σ = 1149327648. Its totient is φ = 884288880.

The previous prime is 1011205387. The next prime is 1011205411. The reversal of 1011205403 is 3045021101.

1011205403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1011205403 - 2⁴ = 1011205387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011205453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103043 + ... + 112428.

It is an arithmetic number, because the mean of its divisors is an integer number (95777304).

Almost surely, 2^1011205403 is an apocalyptic number.

1011205403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1011205403 is a deficient number, since it is larger than the sum of its proper divisors (138122245).

1011205403 is a wasteful number, since it uses less digits than its factorization.

1011205403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215522 (or 215503 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1011205403 is about 31799.4560173598. The cubic root of 1011205403 is about 1003.7212693109.

Adding to 1011205403 its reverse (3045021101), we get a palindrome (4056226504).

The spelling of 1011205403 in words is "one billion, eleven million, two hundred five thousand, four hundred three".