21232303212 has 24 divisors (see below), whose sum is σ = 49544533696. Its totient is φ = 7077078288.

The previous prime is 21232303121. The next prime is 21232303231. The reversal of 21232303212 is 21230323212.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

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, 329823 + ... + 388905.

Almost surely, 2^21232303212 is an apocalyptic number.

It is an amenable number.

21232303212 is an abundant number, since it is smaller than the sum of its proper divisors (28312230484).

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

21232303212 is a wasteful number, since it uses less digits than its factorization.

21232303212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89037 (or 89035 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21232303212 its reverse (21230323212), we get a palindrome (42462626424).

The spelling of 21232303212 in words is "twenty-one billion, two hundred thirty-two million, three hundred three thousand, two hundred twelve".