21001132334 has 16 divisors (see below), whose sum is σ = 38771321568. Its totient is φ = 8308140192.

The previous prime is 21001132309. The next prime is 21001132349. The reversal of 21001132334 is 43323110012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57695237 + ... + 57695600.

It is an arithmetic number, because the mean of its divisors is an integer number (2423207598).

Almost surely, 2^21001132334 is an apocalyptic number.

21001132334 is a deficient number, since it is larger than the sum of its proper divisors (17770189234).

21001132334 is a wasteful number, since it uses less digits than its factorization.

21001132334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115390859.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21001132334 its reverse (43323110012), we get a palindrome (64324242346).

The spelling of 21001132334 in words is "twenty-one billion, one million, one hundred thirty-two thousand, three hundred thirty-four".