21311212110213 has 8 divisors (see below), whose sum is σ = 28437518944800. Its totient is φ = 14196190007888.

The previous prime is 21311212110203. The next prime is 21311212110233. The reversal of 21311212110213 is 31201121211312.

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 21311212110213 - 2¹⁰ = 21311212109189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21311212110213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311212110203) 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, 2821178658 + ... + 2821186211.

It is an arithmetic number, because the mean of its divisors is an integer number (3554689868100).

Almost surely, 2^{21311212110213} is an apocalyptic number.

It is an amenable number.

21311212110213 is a deficient number, since it is larger than the sum of its proper divisors (7126306834587).

21311212110213 is a wasteful number, since it uses less digits than its factorization.

21311212110213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5642366131.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 21311212110213 its reverse (31201121211312), we get a palindrome (52512333321525).

The spelling of 21311212110213 in words is "twenty-one trillion, three hundred eleven billion, two hundred twelve million, one hundred ten thousand, two hundred thirteen".