21313030233212 has 6 divisors (see below), whose sum is σ = 37297802908128. Its totient is φ = 10656515116604.

The previous prime is 21313030233163. The next prime is 21313030233233. The reversal of 21313030233212 is 21233203031312.

It is a super-3 number, since 3×21313030233212³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2664128779148 + ... + 2664128779155.

It is an arithmetic number, because the mean of its divisors is an integer number (6216300484688).

Almost surely, 2^{21313030233212} is an apocalyptic number.

It is an amenable number.

21313030233212 is a deficient number, since it is larger than the sum of its proper divisors (15984772674916).

21313030233212 is a wasteful number, since it uses less digits than its factorization.

21313030233212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5328257558307 (or 5328257558305 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21313030233212 its reverse (21233203031312), we get a palindrome (42546233264524).

The spelling of 21313030233212 in words is "twenty-one trillion, three hundred thirteen billion, thirty million, two hundred thirty-three thousand, two hundred twelve".