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21212202119989 is a prime number
BaseRepresentation
bin1001101001010110110011…
…10001011011001100110101
32210002212101211121112111011
410310223121301123030311
510240020042220314424
6113040430124312221
74316350100025526
oct464533161331465
983085354545434
1021212202119989
116839054106511
1224670976a2671
13bab3c088048a
1453496717884d
1526bba0e19694
hex134ad9c5b335

21212202119989 has 2 divisors, whose sum is σ = 21212202119990. Its totient is φ = 21212202119988.

The previous prime is 21212202119971. The next prime is 21212202120001. The reversal of 21212202119989 is 98991120221212.

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., 20388990683889 + 823211436100 = 4515417^2 + 907310^2 .

It is a cyclic number.

It is not a de Polignac number, because 21212202119989 - 213 = 21212202111797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212202119909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606101059994 + 10606101059995.

It is an arithmetic number, because the mean of its divisors is an integer number (10606101059995).

Almost surely, 221212202119989 is an apocalyptic number.

It is an amenable number.

21212202119989 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212202119989 is an equidigital number, since it uses as much as digits as its factorization.

21212202119989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 49.

The spelling of 21212202119989 in words is "twenty-one trillion, two hundred twelve billion, two hundred two million, one hundred nineteen thousand, nine hundred eighty-nine".