21203113000 has 32 divisors (see below), whose sum is σ = 49615286760. Its totient is φ = 8481244800.

The previous prime is 21203112989. The next prime is 21203113003. The reversal of 21203113000 is 31130212.

It can be written as a sum of positive squares in 4 ways, for example, as 9736558276 + 11466554724 = 98674^2 + 107082^2 .

It is not an unprimeable number, because it can be changed into a prime (21203113003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10600557 + ... + 10602556.

Almost surely, 2^21203113000 is an apocalyptic number.

21203113000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21203113000 is an abundant number, since it is smaller than the sum of its proper divisors (28412173760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21203113000 is a wasteful number, since it uses less digits than its factorization.

21203113000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21203134 (or 21203120 counting only the distinct ones).

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

Adding to 21203113000 its reverse (31130212), we get a palindrome (21234243212).

The spelling of 21203113000 in words is "twenty-one billion, two hundred three million, one hundred thirteen thousand".