21301033011011 has 4 divisors (see below), whose sum is σ = 22939574011872. Its totient is φ = 19662492010152.

The previous prime is 21301033010953. The next prime is 21301033011047. The reversal of 21301033011011 is 11011033010312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21301033011011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21301033011211) 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, 819270500411 + ... + 819270500436.

It is an arithmetic number, because the mean of its divisors is an integer number (5734893502968).

Almost surely, 2^{21301033011011} is an apocalyptic number.

21301033011011 is a deficient number, since it is larger than the sum of its proper divisors (1638541000861).

21301033011011 is a wasteful number, since it uses less digits than its factorization.

21301033011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638541000860.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 21301033011011 its reverse (11011033010312), we get a palindrome (32312066021323).

The spelling of 21301033011011 in words is "twenty-one trillion, three hundred one billion, thirty-three million, eleven thousand, eleven".