86100021 has 12 divisors (see below), whose sum is σ = 142133472. Its totient is φ = 49199976.

The previous prime is 86099977. The next prime is 86100059. The reversal of 86100021 is 12000168.

It is not a de Polignac number, because 86100021 - 2²⁶ = 18991157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86099967 and 86100003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86101021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 683271 + ... + 683396.

It is an arithmetic number, because the mean of its divisors is an integer number (11844456).

Almost surely, 2^86100021 is an apocalyptic number.

It is an amenable number.

86100021 is a deficient number, since it is larger than the sum of its proper divisors (56033451).

86100021 is a wasteful number, since it uses less digits than its factorization.

86100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366680 (or 1366677 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 86100021 is about 9279.0096993160. The cubic root of 86100021 is about 441.5715513386.

Subtracting from 86100021 its sum of digits (18), we obtain a triangular number (86100003 = T₁₃₁₂₂).

Adding to 86100021 its reverse (12000168), we get a palindrome (98100189).

The spelling of 86100021 in words is "eighty-six million, one hundred thousand, twenty-one".