21210321013031 has 8 divisors (see below), whose sum is σ = 22470842159280. Its totient is φ = 19951228222848.

The previous prime is 21210321013003. The next prime is 21210321013093. The reversal of 21210321013031 is 13031012301212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210321013031 is a prime.

It is a super-2 number, since 2×21210321013031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21210321012994 and 21210321013012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210321013631) 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, 357058436 + ... + 357117833.

It is an arithmetic number, because the mean of its divisors is an integer number (2808855269910).

Almost surely, 2^{21210321013031} is an apocalyptic number.

21210321013031 is a deficient number, since it is larger than the sum of its proper divisors (1260521146249).

21210321013031 is a wasteful number, since it uses less digits than its factorization.

21210321013031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714178033.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21210321013031 its reverse (13031012301212), we get a palindrome (34241333314243).

The spelling of 21210321013031 in words is "twenty-one trillion, two hundred ten billion, three hundred twenty-one million, thirteen thousand, thirty-one".