100821164 has 6 divisors (see below), whose sum is σ = 176437044. Its totient is φ = 50410580.

The previous prime is 100821079. The next prime is 100821187. The reversal of 100821164 is 461128001.

It is a super-2 number, since 2×100821164² = 20329814220629792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12602642 + ... + 12602649.

It is an arithmetic number, because the mean of its divisors is an integer number (29406174).

Almost surely, 2^100821164 is an apocalyptic number.

It is an amenable number.

100821164 is a deficient number, since it is larger than the sum of its proper divisors (75615880).

100821164 is a wasteful number, since it uses less digits than its factorization.

100821164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25205295 (or 25205293 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 100821164 is about 10040.9742555192. The cubic root of 100821164 is about 465.4259233896.

Adding to 100821164 its reverse (461128001), we get a palindrome (561949165).

It can be divided in two parts, 1008 and 21164, that multiplied together give a palindrome (21333312).

The spelling of 100821164 in words is "one hundred million, eight hundred twenty-one thousand, one hundred sixty-four".