21312232030 has 8 divisors (see below), whose sum is σ = 38362017672. Its totient is φ = 8524892808.

The previous prime is 21312232021. The next prime is 21312232063. The reversal of 21312232030 is 3023221312.

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

It is a super-2 number, since 2×21312232030² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21312231989 and 21312232007.

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, 1065611592 + ... + 1065611611.

It is an arithmetic number, because the mean of its divisors is an integer number (4795252209).

Almost surely, 2^21312232030 is an apocalyptic number.

21312232030 is a deficient number, since it is larger than the sum of its proper divisors (17049785642).

21312232030 is a wasteful number, since it uses less digits than its factorization.

21312232030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131223210.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21312232030 its reverse (3023221312), we get a palindrome (24335453342).

The spelling of 21312232030 in words is "twenty-one billion, three hundred twelve million, two hundred thirty-two thousand, thirty".