102100000985 has 4 divisors (see below), whose sum is σ = 122520001188. Its totient is φ = 81680000784.

The previous prime is 102100000979. The next prime is 102100001027. The reversal of 102100000985 is 589000001201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28310081536 + 73789919449 = 168256^2 + 271643^2 .

It is a cyclic number.

It is not a de Polignac number, because 102100000985 - 2¹⁰ = 102099999961 is a prime.

It is a super-2 number, since 2×102100000985² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10210000094 + ... + 10210000103.

It is an arithmetic number, because the mean of its divisors is an integer number (30630000297).

Almost surely, 2^102100000985 is an apocalyptic number.

It is an amenable number.

102100000985 is a deficient number, since it is larger than the sum of its proper divisors (20420000203).

102100000985 is an equidigital number, since it uses as much as digits as its factorization.

102100000985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20420000202.

The product of its (nonzero) digits is 720, while the sum is 26.

The spelling of 102100000985 in words is "one hundred two billion, one hundred million, nine hundred eighty-five", and thus it is an aban number.