21112120020011 has 8 divisors (see below), whose sum is σ = 21115061338560. Its totient is φ = 21109178933568.

The previous prime is 21112120019993. The next prime is 21112120020041. The reversal of 21112120020011 is 11002002121112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112120020011 is a prime.

It is a super-2 number, since 2×21112120020011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112120020041) 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, 251152190 + ... + 251236236.

It is an arithmetic number, because the mean of its divisors is an integer number (2639382667320).

Almost surely, 2^{21112120020011} is an apocalyptic number.

21112120020011 is a deficient number, since it is larger than the sum of its proper divisors (2941318549).

21112120020011 is a wasteful number, since it uses less digits than its factorization.

21112120020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116053.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21112120020011 its reverse (11002002121112), we get a palindrome (32114122141123).

The spelling of 21112120020011 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty million, twenty thousand, eleven".