100121010201 has 16 divisors (see below), whose sum is σ = 148332801600. Its totient is φ = 66744919584.

The previous prime is 100121010191. The next prime is 100121010203. The reversal of 100121010201 is 102010121001.

It is a happy number.

It is not a de Polignac number, because 100121010201 - 2¹⁵ = 100120977433 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (100121010203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 997810 + ... + 1093556.

It is an arithmetic number, because the mean of its divisors is an integer number (9270800100).

Almost surely, 2^100121010201 is an apocalyptic number.

It is an amenable number.

100121010201 is a deficient number, since it is larger than the sum of its proper divisors (48211791399).

100121010201 is an equidigital number, since it uses as much as digits as its factorization.

100121010201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134485 (or 134479 counting only the distinct ones).

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

Adding to 100121010201 its reverse (102010121001), we get a palindrome (202131131202).

The spelling of 100121010201 in words is "one hundred billion, one hundred twenty-one million, ten thousand, two hundred one".