21231232010 has 32 divisors (see below), whose sum is σ = 39124944000. Its totient is φ = 8292487360.

The previous prime is 21231231971. The next prime is 21231232037. The reversal of 21231232010 is 1023213212.

It is a self number, because there is not a number n which added to its sum of digits gives 21231232010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32846 + ... + 208665.

It is an arithmetic number, because the mean of its divisors is an integer number (1222654500).

Almost surely, 2^21231232010 is an apocalyptic number.

21231232010 is a deficient number, since it is larger than the sum of its proper divisors (17893711990).

21231232010 is a wasteful number, since it uses less digits than its factorization.

21231232010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241726.

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

Adding to 21231232010 its reverse (1023213212), we get a palindrome (22254445222).

The spelling of 21231232010 in words is "twenty-one billion, two hundred thirty-one million, two hundred thirty-two thousand, ten".