21212003313 has 12 divisors (see below), whose sum is σ = 32252169040. Its totient is φ = 13397054616.

The previous prime is 21212003311. The next prime is 21212003321. The reversal of 21212003313 is 31330021212.

21212003313 is a `hidden beast` number, since 212 + 120 + 0 + 331 + 3 = 666.

It is not a de Polignac number, because 21212003313 - 2¹ = 21212003311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21212003311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62023231 + ... + 62023572.

Almost surely, 2^21212003313 is an apocalyptic number.

It is an amenable number.

21212003313 is a deficient number, since it is larger than the sum of its proper divisors (11040165727).

21212003313 is a wasteful number, since it uses less digits than its factorization.

21212003313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124046828 (or 124046825 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21212003313 its reverse (31330021212), we get a palindrome (52542024525).

The spelling of 21212003313 in words is "twenty-one billion, two hundred twelve million, three thousand, three hundred thirteen".