21212013313 has 8 divisors (see below), whose sum is σ = 22597571808. Its totient is φ = 19841765184.

The previous prime is 21212013299. The next prime is 21212013323. The reversal of 21212013313 is 31331021212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21212013313 - 2¹³ = 21212005121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21212013323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3824731 + ... + 3830272.

It is an arithmetic number, because the mean of its divisors is an integer number (2824696476).

Almost surely, 2^21212013313 is an apocalyptic number.

It is an amenable number.

21212013313 is a deficient number, since it is larger than the sum of its proper divisors (1385558495).

21212013313 is a wasteful number, since it uses less digits than its factorization.

21212013313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7655183.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21212013313 its reverse (31331021212), we get a palindrome (52543034525).

The spelling of 21212013313 in words is "twenty-one billion, two hundred twelve million, thirteen thousand, three hundred thirteen".