21101112220311 has 6 divisors (see below), whose sum is σ = 30479384318240. Its totient is φ = 14067408146868.

The previous prime is 21101112220303. The next prime is 21101112220313. The reversal of 21101112220311 is 11302221110112.

It is a happy number.

21101112220311 is a `hidden beast` number, since 2 + 110 + 11 + 12 + 220 + 311 = 666.

It is not a de Polignac number, because 21101112220311 - 2³ = 21101112220303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101112220313) 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 5 ways as a sum of consecutive naturals, for example, 1172284012231 + ... + 1172284012248.

Almost surely, 2^{21101112220311} is an apocalyptic number.

21101112220311 is a deficient number, since it is larger than the sum of its proper divisors (9378272097929).

21101112220311 is a wasteful number, since it uses less digits than its factorization.

21101112220311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344568024485 (or 2344568024482 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 21101112220311 its reverse (11302221110112), we get a palindrome (32403333330423).

The spelling of 21101112220311 in words is "twenty-one trillion, one hundred one billion, one hundred twelve million, two hundred twenty thousand, three hundred eleven".