21333231030 has 16 divisors (see below), whose sum is σ = 51199754544. Its totient is φ = 5688861600.

The previous prime is 21333231013. The next prime is 21333231043. The reversal of 21333231030 is 3013233312.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21333230988 and 21333231006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355553821 + ... + 355553880.

It is an arithmetic number, because the mean of its divisors is an integer number (3199984659).

Almost surely, 2^21333231030 is an apocalyptic number.

21333231030 is an abundant number, since it is smaller than the sum of its proper divisors (29866523514).

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

21333231030 is a wasteful number, since it uses less digits than its factorization.

21333231030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711107711.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21333231030 its reverse (3013233312), we get a palindrome (24346464342).

The spelling of 21333231030 in words is "twenty-one billion, three hundred thirty-three million, two hundred thirty-one thousand, thirty".