21021012230 has 8 divisors (see below), whose sum is σ = 37837822032. Its totient is φ = 8408404888.

The previous prime is 21021012203. The next prime is 21021012247. The reversal of 21021012230 is 3221012012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051050602 + ... + 1051050621.

It is an arithmetic number, because the mean of its divisors is an integer number (4729727754).

Almost surely, 2^21021012230 is an apocalyptic number.

21021012230 is a deficient number, since it is larger than the sum of its proper divisors (16816809802).

21021012230 is a wasteful number, since it uses less digits than its factorization.

21021012230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102101230.

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

Adding to 21021012230 its reverse (3221012012), we get a palindrome (24242024242).

The spelling of 21021012230 in words is "twenty-one billion, twenty-one million, twelve thousand, two hundred thirty".