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121320637 is a prime number
BaseRepresentation
bin1110011101100…
…11010010111101
322110021201121221
413032303102331
5222024230022
620012153341
73002131324
oct716632275
9273251557
10121320637
1162533a99
1234768851
131c19a079
14121810bb
15a9b6cc7
hex73b34bd

121320637 has 2 divisors, whose sum is σ = 121320638. Its totient is φ = 121320636.

The previous prime is 121320631. The next prime is 121320691. The reversal of 121320637 is 736023121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73170916 + 48149721 = 8554^2 + 6939^2 .

It is a cyclic number.

It is not a de Polignac number, because 121320637 - 219 = 120796349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121320631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60660318 + 60660319.

It is an arithmetic number, because the mean of its divisors is an integer number (60660319).

Almost surely, 2121320637 is an apocalyptic number.

It is an amenable number.

121320637 is a deficient number, since it is larger than the sum of its proper divisors (1).

121320637 is an equidigital number, since it uses as much as digits as its factorization.

121320637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 121320637 is about 11014.5647667078. The cubic root of 121320637 is about 495.0452456686.

Adding to 121320637 its reverse (736023121), we get a palindrome (857343758).

The spelling of 121320637 in words is "one hundred twenty-one million, three hundred twenty thousand, six hundred thirty-seven".