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11122222021 is a prime number
BaseRepresentation
bin10100101101110111…
…11010001111000101
31001201010102102022221
422112323322033011
5140234242101041
65035351452341
7542422220161
oct122673721705
931633372287
1011122222021
114798228029
1221a49870b1
13108334ba81
14777207ca1
154516832d1
hex296efa3c5

11122222021 has 2 divisors, whose sum is σ = 11122222022. Its totient is φ = 11122222020.

The previous prime is 11122222009. The next prime is 11122222031. The reversal of 11122222021 is 12022222111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8411457796 + 2710764225 = 91714^2 + 52065^2 .

It is an emirp because it is prime and its reverse (12022222111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-11122222021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11122221986 and 11122222004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11122222031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561111010 + 5561111011.

It is an arithmetic number, because the mean of its divisors is an integer number (5561111011).

Almost surely, 211122222021 is an apocalyptic number.

It is an amenable number.

11122222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122222021 is an equidigital number, since it uses as much as digits as its factorization.

11122222021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11122222021 its reverse (12022222111), we get a palindrome (23144444132).

The spelling of 11122222021 in words is "eleven billion, one hundred twenty-two million, two hundred twenty-two thousand, twenty-one".