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2111100101221 is a prime number
BaseRepresentation
bin11110101110000111010…
…111110010001001100101
321110211010012021202111211
4132232013113302021211
5234042013111214341
64253454225431421
7305344012532506
oct36560727621145
97424105252454
102111100101221
11744348a75261
122a118b19b571
131240ca949037
147426bbdabad
1539dab97b181
hex1eb875f2265

2111100101221 has 2 divisors, whose sum is σ = 2111100101222. Its totient is φ = 2111100101220.

The previous prime is 2111100101207. The next prime is 2111100101239. The reversal of 2111100101221 is 1221010011112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1918695928900 + 192404172321 = 1385170^2 + 438639^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111100101221 - 233 = 2102510166629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111104101221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055550050610 + 1055550050611.

It is an arithmetic number, because the mean of its divisors is an integer number (1055550050611).

Almost surely, 22111100101221 is an apocalyptic number.

It is an amenable number.

2111100101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111100101221 is an equidigital number, since it uses as much as digits as its factorization.

2111100101221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2111100101221 its reverse (1221010011112), we get a palindrome (3332110112333).

The spelling of 2111100101221 in words is "two trillion, one hundred eleven billion, one hundred million, one hundred one thousand, two hundred twenty-one".