21101122220011 has 8 divisors (see below), whose sum is σ = 21359153919600. Its totient is φ = 20843555863680.

The previous prime is 21101122219987. The next prime is 21101122220033. The reversal of 21101122220011 is 11002222110112.

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

It is a cyclic number.

It is not a de Polignac number, because 21101122220011 - 2⁵ = 21101122219979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101122220071) 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, 116244570 + ... + 116425951.

It is an arithmetic number, because the mean of its divisors is an integer number (2669894239950).

Almost surely, 2^{21101122220011} is an apocalyptic number.

21101122220011 is a deficient number, since it is larger than the sum of its proper divisors (258031699589).

21101122220011 is a wasteful number, since it uses less digits than its factorization.

21101122220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232671629.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21101122220011 its reverse (11002222110112), we get a palindrome (32103344330123).

The spelling of 21101122220011 in words is "twenty-one trillion, one hundred one billion, one hundred twenty-two million, two hundred twenty thousand, eleven".