21213113230 has 32 divisors (see below), whose sum is σ = 40517547840. Its totient is φ = 7968760320.

The previous prime is 21213113221. The next prime is 21213113249. The reversal of 21213113230 is 3231131212.

It is a junction number, because it is equal to n+sod(n) for n = 21213113198 and 21213113207.

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, 56970 + ... + 213709.

It is an arithmetic number, because the mean of its divisors is an integer number (1266173370).

Almost surely, 2^21213113230 is an apocalyptic number.

21213113230 is a deficient number, since it is larger than the sum of its proper divisors (19304434610).

21213113230 is a wasteful number, since it uses less digits than its factorization.

21213113230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271164.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21213113230 its reverse (3231131212), we get a palindrome (24444244442).

The spelling of 21213113230 in words is "twenty-one billion, two hundred thirteen million, one hundred thirteen thousand, two hundred thirty".