21233113230 has 32 divisors (see below), whose sum is σ = 58239396864. Its totient is φ = 4853282976.

The previous prime is 21233113217. The next prime is 21233113267. The reversal of 21233113230 is 3231133212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21233113197 and 21233113206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50554822 + ... + 50555241.

It is an arithmetic number, because the mean of its divisors is an integer number (1819981152).

Almost surely, 2^21233113230 is an apocalyptic number.

21233113230 is an abundant number, since it is smaller than the sum of its proper divisors (37006283634).

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

21233113230 is a wasteful number, since it uses less digits than its factorization.

21233113230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101110080.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21233113230 its reverse (3231133212), we get a palindrome (24464246442).

The spelling of 21233113230 in words is "twenty-one billion, two hundred thirty-three million, one hundred thirteen thousand, two hundred thirty".