21131133010 has 48 divisors (see below), whose sum is σ = 41367567240. Its totient is φ = 7768051200.

The previous prime is 21131133007. The next prime is 21131133017. The reversal of 21131133010 is 1033113112.

It can be written as a sum of positive squares in 12 ways, for example, as 243079281 + 20888053729 = 15591^2 + 144527^2 .

It is not an unprimeable number, because it can be changed into a prime (21131133017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 359710 + ... + 414310.

Almost surely, 2^21131133010 is an apocalyptic number.

21131133010 is a deficient number, since it is larger than the sum of its proper divisors (20236434230).

21131133010 is a wasteful number, since it uses less digits than its factorization.

21131133010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54863 (or 54850 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21131133010 its reverse (1033113112), we get a palindrome (22164246122).

The spelling of 21131133010 in words is "twenty-one billion, one hundred thirty-one million, one hundred thirty-three thousand, ten".