100121211 has 32 divisors (see below), whose sum is σ = 157766400. Its totient is φ = 62536320.

The previous prime is 100121201. The next prime is 100121213. The reversal of 100121211 is 112121001.

It is a happy number.

It is not a de Polignac number, because 100121211 - 2¹¹ = 100119163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 100121193 and 100121202.

It is not an unprimeable number, because it can be changed into a prime (100121213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151600 + ... + 152258.

It is an arithmetic number, because the mean of its divisors is an integer number (4930200).

Almost surely, 2^100121211 is an apocalyptic number.

100121211 is a deficient number, since it is larger than the sum of its proper divisors (57645189).

100121211 is a wasteful number, since it uses less digits than its factorization.

100121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016 (or 1010 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 100121211 is about 10006.0587145989. The cubic root of 100121211 is about 464.3463448484.

Adding to 100121211 its reverse (112121001), we get a palindrome (212242212).

The spelling of 100121211 in words is "one hundred million, one hundred twenty-one thousand, two hundred eleven".