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BaseRepresentation
bin10011100101000001…
…010101010100010111
32000021001222110120011
4103211001111110113
5321023140413421
613354002421051
71342643522032
oct234501252427
960231873504
1021022201111
118a0853692a
1240a8361787
131ca03b9072
141035d72019
158308854e1
hex4e5055517

21022201111 has 2 divisors, whose sum is σ = 21022201112. Its totient is φ = 21022201110.

The previous prime is 21022201033. The next prime is 21022201153. The reversal of 21022201111 is 11110222012.

Adding to 21022201111 its reverse (11110222012), we get a palindrome (32132423123).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21022201111 - 211 = 21022199063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21022201091 and 21022201100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022204111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511100555 + 10511100556.

It is an arithmetic number, because the mean of its divisors is an integer number (10511100556).

Almost surely, 221022201111 is an apocalyptic number.

21022201111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022201111 is an equidigital number, since it uses as much as digits as its factorization.

21022201111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

The spelling of 21022201111 in words is "twenty-one billion, twenty-two million, two hundred one thousand, one hundred eleven".