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21900111110011 = 275349121161947
BaseRepresentation
bin1001111101011000001000…
…10101111101111101111011
32212112122000101201222122201
410332230010111331331323
510332302411421010021
6114324434441331031
74420142111665231
oct476540425757573
985478011658581
1021900111110011
116a8386a872382
12255847aa96a77
13c2b23006c034
14559d84730951
1527ea13775591
hex13eb0457df7b

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, 221900111110011 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".

Divisors: 1 2753 49121 161947 135230113 445840091 7954998587 21900111110011