21300133012 has 12 divisors (see below), whose sum is σ = 37785852916. Its totient is φ = 10504175040.

The previous prime is 21300133003. The next prime is 21300133021. The reversal of 21300133012 is 21033100312.

It is an interprime number because it is at equal distance from previous prime (21300133003) and next prime (21300133021).

It can be written as a sum of positive squares in 2 ways, for example, as 9148157316 + 12151975696 = 95646^2 + 110236^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36472539 + ... + 36473122.

Almost surely, 2^21300133012 is an apocalyptic number.

It is an amenable number.

21300133012 is a deficient number, since it is larger than the sum of its proper divisors (16485719904).

21300133012 is a wasteful number, since it uses less digits than its factorization.

21300133012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72945738 (or 72945736 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21300133012 its reverse (21033100312), we get a palindrome (42333233324).

The spelling of 21300133012 in words is "twenty-one billion, three hundred million, one hundred thirty-three thousand, twelve".