21031010303213 has 8 divisors (see below), whose sum is σ = 21049205024640. Its totient is φ = 21012822779760.

The previous prime is 21031010303111. The next prime is 21031010303257. The reversal of 21031010303213 is 31230301013012.

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 21031010303213 - 2¹⁴ = 21031010286829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031010303263) 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, 4054856 + ... + 7648782.

It is an arithmetic number, because the mean of its divisors is an integer number (2631150628080).

Almost surely, 2^{21031010303213} is an apocalyptic number.

It is an amenable number.

21031010303213 is a deficient number, since it is larger than the sum of its proper divisors (18194721427).

21031010303213 is a wasteful number, since it uses less digits than its factorization.

21031010303213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3598987.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21031010303213 its reverse (31230301013012), we get a palindrome (52261311316225).

The spelling of 21031010303213 in words is "twenty-one trillion, thirty-one billion, ten million, three hundred three thousand, two hundred thirteen".