213321212013 has 32 divisors (see below), whose sum is σ = 370657679616. Its totient is φ = 105902189568.

The previous prime is 213321212003. The next prime is 213321212021. The reversal of 213321212013 is 310212123312.

It is not a de Polignac number, because 213321212013 - 2¹² = 213321207917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213321212003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22977606 + ... + 22986887.

It is an arithmetic number, because the mean of its divisors is an integer number (11583052488).

Almost surely, 2^213321212013 is an apocalyptic number.

It is an amenable number.

213321212013 is a deficient number, since it is larger than the sum of its proper divisors (157336467603).

213321212013 is a wasteful number, since it uses less digits than its factorization.

213321212013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45964533.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213321212013 its reverse (310212123312), we get a palindrome (523533335325).

The spelling of 213321212013 in words is "two hundred thirteen billion, three hundred twenty-one million, two hundred twelve thousand, thirteen".