21013023211211 has 4 divisors (see below), whose sum is σ = 21075376396152. Its totient is φ = 20950670026272.

The previous prime is 21013023211171. The next prime is 21013023211231. The reversal of 21013023211211 is 11211232031012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21013023211211 - 2³⁴ = 20995843342027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21013023211231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31176591965 + ... + 31176592638.

It is an arithmetic number, because the mean of its divisors is an integer number (5268844099038).

Almost surely, 2^{21013023211211} is an apocalyptic number.

21013023211211 is a deficient number, since it is larger than the sum of its proper divisors (62353184941).

21013023211211 is an equidigital number, since it uses as much as digits as its factorization.

21013023211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62353184940.

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

Adding to 21013023211211 its reverse (11211232031012), we get a palindrome (32224255242223).

The spelling of 21013023211211 in words is "twenty-one trillion, thirteen billion, twenty-three million, two hundred eleven thousand, two hundred eleven".