21301031213 has 64 divisors (see below), whose sum is σ = 27683942400. Its totient is φ = 15913497600.

The previous prime is 21301031207. The next prime is 21301031221. The reversal of 21301031213 is 31213010312.

It is not a de Polignac number, because 21301031213 - 2⁶ = 21301031149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21301031191 and 21301031200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301031203) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35560688 + ... + 35561286.

It is an arithmetic number, because the mean of its divisors is an integer number (432561600).

Almost surely, 2^21301031213 is an apocalyptic number.

It is an amenable number.

21301031213 is a deficient number, since it is larger than the sum of its proper divisors (6382911187).

21301031213 is a wasteful number, since it uses less digits than its factorization.

21301031213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21301031213 its reverse (31213010312), we get a palindrome (52514041525).

The spelling of 21301031213 in words is "twenty-one billion, three hundred one million, thirty-one thousand, two hundred thirteen".