21032012231 has 8 divisors (see below), whose sum is σ = 21729795360. Its totient is φ = 20341037088.

The previous prime is 21032012227. The next prime is 21032012249. The reversal of 21032012231 is 13221023012.

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

It is a cyclic number.

It is not a de Polignac number, because 21032012231 - 2² = 21032012227 is a prime.

It is a super-2 number, since 2×21032012231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032012731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1695716 + ... + 1708073.

It is an arithmetic number, because the mean of its divisors is an integer number (2716224420).

Almost surely, 2^21032012231 is an apocalyptic number.

21032012231 is a deficient number, since it is larger than the sum of its proper divisors (697783129).

21032012231 is a wasteful number, since it uses less digits than its factorization.

21032012231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3403993.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21032012231 its reverse (13221023012), we get a palindrome (34253035243).

The spelling of 21032012231 in words is "twenty-one billion, thirty-two million, twelve thousand, two hundred thirty-one".