21213113012021 has 8 divisors (see below), whose sum is σ = 24759378105600. Its totient is φ = 17795803012848.

The previous prime is 21213113012017. The next prime is 21213113012027. The reversal of 21213113012021 is 12021031131212.

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

It is not a de Polignac number, because 21213113012021 - 2² = 21213113012017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21213113011984 and 21213113012002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213113012027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32238773246 + ... + 32238773903.

It is an arithmetic number, because the mean of its divisors is an integer number (3094922263200).

Almost surely, 2^{21213113012021} is an apocalyptic number.

It is an amenable number.

21213113012021 is a deficient number, since it is larger than the sum of its proper divisors (3546265093579).

21213113012021 is an equidigital number, since it uses as much as digits as its factorization.

21213113012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64477547203.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21213113012021 its reverse (12021031131212), we get a palindrome (33234144143233).

The spelling of 21213113012021 in words is "twenty-one trillion, two hundred thirteen billion, one hundred thirteen million, twelve thousand, twenty-one".