20211321013 has 8 divisors (see below), whose sum is σ = 21787001600. Its totient is φ = 18638635248.

The previous prime is 20211320999. The next prime is 20211321019. The reversal of 20211321013 is 31012311202.

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 20211321013 - 2⁵ = 20211320981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211321019) 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, 734673 + ... + 761686.

It is an arithmetic number, because the mean of its divisors is an integer number (2723375200).

Almost surely, 2^20211321013 is an apocalyptic number.

It is an amenable number.

20211321013 is a deficient number, since it is larger than the sum of its proper divisors (1575680587).

20211321013 is a wasteful number, since it uses less digits than its factorization.

20211321013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497411.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20211321013 its reverse (31012311202), we get a palindrome (51223632215).

The spelling of 20211321013 in words is "twenty billion, two hundred eleven million, three hundred twenty-one thousand, thirteen".