21102012230 has 32 divisors (see below), whose sum is σ = 40994287488. Its totient is φ = 7774588800.

The previous prime is 21102012227. The next prime is 21102012233. The reversal of 21102012230 is 3221020112.

It is a happy number.

21102012230 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (21102012227) and next prime (21102012233).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102012233) 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, 116126 + ... + 235985.

It is an arithmetic number, because the mean of its divisors is an integer number (1281071484).

Almost surely, 2^21102012230 is an apocalyptic number.

21102012230 is a deficient number, since it is larger than the sum of its proper divisors (19892275258).

21102012230 is a wasteful number, since it uses less digits than its factorization.

21102012230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352592.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21102012230 its reverse (3221020112), we get a palindrome (24323032342).

The spelling of 21102012230 in words is "twenty-one billion, one hundred two million, twelve thousand, two hundred thirty".