1021312203 has 16 divisors (see below), whose sum is σ = 1389068832. Its totient is φ = 667296000.

The previous prime is 1021312177. The next prime is 1021312219. The reversal of 1021312203 is 3022131201.

It is not a de Polignac number, because 1021312203 - 2⁶ = 1021312139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021319203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41493 + ... + 61353.

It is an arithmetic number, because the mean of its divisors is an integer number (86816802).

Almost surely, 2^1021312203 is an apocalyptic number.

1021312203 is a deficient number, since it is larger than the sum of its proper divisors (367756629).

1021312203 is a wasteful number, since it uses less digits than its factorization.

1021312203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20206.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1021312203 is about 31957.9755773109. The cubic root of 1021312203 is about 1007.0541890740.

Adding to 1021312203 its reverse (3022131201), we get a palindrome (4043443404).

The spelling of 1021312203 in words is "one billion, twenty-one million, three hundred twelve thousand, two hundred three".