21033001712 has 20 divisors (see below), whose sum is σ = 41267284320. Its totient is φ = 10383379968.

The previous prime is 21033001711. The next prime is 21033001723. The reversal of 21033001712 is 21710033012.

It is a super-2 number, since 2×21033001712² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033001711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8318753 + ... + 8321280.

It is an arithmetic number, because the mean of its divisors is an integer number (2063364216).

Almost surely, 2^21033001712 is an apocalyptic number.

It is an amenable number.

21033001712 is a deficient number, since it is larger than the sum of its proper divisors (20234282608).

21033001712 is a wasteful number, since it uses less digits than its factorization.

21033001712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16640120 (or 16640114 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

Adding to 21033001712 its reverse (21710033012), we get a palindrome (42743034724).

It can be divided in two parts, 2103300 and 1712, that added together give a palindrome (2105012).

The spelling of 21033001712 in words is "twenty-one billion, thirty-three million, one thousand, seven hundred twelve".