21112020013 has 8 divisors (see below), whose sum is σ = 24349381760. Its totient is φ = 17929998000.

The previous prime is 21112020011. The next prime is 21112020019. The reversal of 21112020013 is 31002021112.

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 21112020013 - 2¹ = 21112020011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21112019975 and 21112020002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112020011) 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, 13834113 + ... + 13835638.

It is an arithmetic number, because the mean of its divisors is an integer number (3043672720).

Almost surely, 2^21112020013 is an apocalyptic number.

It is an amenable number.

21112020013 is a deficient number, since it is larger than the sum of its proper divisors (3237361747).

21112020013 is a wasteful number, since it uses less digits than its factorization.

21112020013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27669867.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21112020013 its reverse (31002021112), we get a palindrome (52114041125).

The spelling of 21112020013 in words is "twenty-one billion, one hundred twelve million, twenty thousand, thirteen".