102085684981 has 16 divisors (see below), whose sum is σ = 123654833280. Its totient is φ = 82273121280.

The previous prime is 102085684949. The next prime is 102085685011. The reversal of 102085684981 is 189486580201.

It is a happy number.

It is not a de Polignac number, because 102085684981 - 2⁵ = 102085684949 is a prime.

It is a super-2 number, since 2×102085684981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102085684901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305035 + ... + 545176.

It is an arithmetic number, because the mean of its divisors is an integer number (7728427080).

Almost surely, 2^102085684981 is an apocalyptic number.

It is an amenable number.

102085684981 is a deficient number, since it is larger than the sum of its proper divisors (21569148299).

102085684981 is a wasteful number, since it uses less digits than its factorization.

102085684981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851244.

The product of its (nonzero) digits is 1105920, while the sum is 52.

The spelling of 102085684981 in words is "one hundred two billion, eighty-five million, six hundred eighty-four thousand, nine hundred eighty-one".