21013301211021 has 40 divisors (see below), whose sum is σ = 36277645124160. Its totient is φ = 11872683801792.

The previous prime is 21013301211017. The next prime is 21013301211029. The reversal of 21013301211021 is 12011210331012.

21013301211021 is a `hidden beast` number, since 2 + 101 + 330 + 1 + 211 + 0 + 21 = 666.

It is not a de Polignac number, because 21013301211021 - 2² = 21013301211017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21013301210985 and 21013301211003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013301211029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 208154571 + ... + 208255496.

It is an arithmetic number, because the mean of its divisors is an integer number (906941128104).

Almost surely, 2^{21013301211021} is an apocalyptic number.

21013301211021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21013301211021 is a deficient number, since it is larger than the sum of its proper divisors (15264343913139).

21013301211021 is an equidigital number, since it uses as much as digits as its factorization.

21013301211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416410175 (or 416410166 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21013301211021 its reverse (12011210331012), we get a palindrome (33024511542033).

The spelling of 21013301211021 in words is "twenty-one trillion, thirteen billion, three hundred one million, two hundred eleven thousand, twenty-one".