100021194 has 96 divisors (see below), whose sum is σ = 268894080. Its totient is φ = 26165376.

The previous prime is 100021177. The next prime is 100021199. The reversal of 100021194 is 491120001.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (100021199) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 371692 + ... + 371960.

It is an arithmetic number, because the mean of its divisors is an integer number (2800980).

Almost surely, 2^100021194 is an apocalyptic number.

100021194 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 100021194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134447040).

100021194 is an abundant number, since it is smaller than the sum of its proper divisors (168872886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100021194 is a wasteful number, since it uses less digits than its factorization.

100021194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 100021194 is about 10001.0596438577. The cubic root of 100021194 is about 464.1916723229.

Adding to 100021194 its reverse (491120001), we get a palindrome (591141195).

The spelling of 100021194 in words is "one hundred million, twenty-one thousand, one hundred ninety-four".