21900111110011 has 8 divisors (see below), whose sum is σ = 21908647392624. Its totient is φ = 21891575255040.

The previous prime is 21900111109913. The next prime is 21900111110023. The reversal of 21900111110011 is 11001111100912.

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 21900111110011 - 2¹⁹ = 21900110585723 is a prime.

It is a super-2 number, since 2×21900111110011² (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 (21900111110411) 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, 135149140 + ... + 135311086.

It is an arithmetic number, because the mean of its divisors is an integer number (2738580924078).

Almost surely, 2^{21900111110011} is an apocalyptic number.

21900111110011 is a deficient number, since it is larger than the sum of its proper divisors (8536282613).

21900111110011 is a wasteful number, since it uses less digits than its factorization.

21900111110011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213821.

The product of its (nonzero) digits is 18, while the sum is 19.

Adding to 21900111110011 its reverse (11001111100912), we get a palindrome (32901222210923).

The spelling of 21900111110011 in words is "twenty-one trillion, nine hundred billion, one hundred eleven million, one hundred ten thousand, eleven".