10521199889 has 2 divisors, whose sum is σ = 10521199890. Its totient is φ = 10521199888.

The previous prime is 10521199873. The next prime is 10521199937. The reversal of 10521199889 is 98899112501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6513297025 + 4007902864 = 80705^2 + 63308^2 .

It is a cyclic number.

It is not a de Polignac number, because 10521199889 - 2⁴ = 10521199873 is a prime.

It is a super-2 number, since 2×10521199889² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10521199889.

It is not a weakly prime, because it can be changed into another prime (10521199489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5260599944 + 5260599945.

It is an arithmetic number, because the mean of its divisors is an integer number (5260599945).

Almost surely, 2^10521199889 is an apocalyptic number.

It is an amenable number.

10521199889 is a deficient number, since it is larger than the sum of its proper divisors (1).

10521199889 is an equidigital number, since it uses as much as digits as its factorization.

10521199889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 53.

The spelling of 10521199889 in words is "ten billion, five hundred twenty-one million, one hundred ninety-nine thousand, eight hundred eighty-nine".