21101337306 has 48 divisors (see below), whose sum is σ = 52262765568. Its totient is φ = 6027588000.

The previous prime is 21101337293. The next prime is 21101337307. The reversal of 21101337306 is 60373310112.

21101337306 is a `hidden beast` number, since 21 + 1 + 0 + 1 + 337 + 306 = 666.

It is a super-2 number, since 2×21101337306² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21101337306.

It is not an unprimeable number, because it can be changed into a prime (21101337307) 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, 626311 + ... + 659141.

It is an arithmetic number, because the mean of its divisors is an integer number (1088807616).

Almost surely, 2^21101337306 is an apocalyptic number.

21101337306 is an abundant number, since it is smaller than the sum of its proper divisors (31161428262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21101337306 is a wasteful number, since it uses less digits than its factorization.

21101337306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37947 (or 37944 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

Adding to 21101337306 its reverse (60373310112), we get a palindrome (81474647418).

The spelling of 21101337306 in words is "twenty-one billion, one hundred one million, three hundred thirty-seven thousand, three hundred six".