100010202121 has 4 divisors (see below), whose sum is σ = 101000402244. Its totient is φ = 99020002000.

The previous prime is 100010202109. The next prime is 100010202163. The reversal of 100010202121 is 121202010001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121202010001 = 101 ⋅1200019901.

It can be written as a sum of positive squares in 2 ways, for example, as 87622512121 + 12387690000 = 296011^2 + 111300^2 .

It is a cyclic number.

It is not a de Polignac number, because 100010202121 - 2¹³ = 100010193929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100010202098 and 100010202107.

It is not an unprimeable number, because it can be changed into a prime (100010202421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495099910 + ... + 495100111.

It is an arithmetic number, because the mean of its divisors is an integer number (25250100561).

Almost surely, 2^100010202121 is an apocalyptic number.

It is an amenable number.

100010202121 is a deficient number, since it is larger than the sum of its proper divisors (990200123).

100010202121 is an equidigital number, since it uses as much as digits as its factorization.

100010202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990200122.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 100010202121 its reverse (121202010001), we get a palindrome (221212212122).

The spelling of 100010202121 in words is "one hundred billion, ten million, two hundred two thousand, one hundred twenty-one".