10000202121 has 96 divisors (see below), whose sum is σ = 18332158208. Its totient is φ = 5111631360.

The previous prime is 10000202119. The next prime is 10000202159. The reversal of 10000202121 is 12120200001.

10000202121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10000202121 - 2¹ = 10000202119 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10000202101) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10029795 + ... + 10030791.

Almost surely, 2^10000202121 is an apocalyptic number.

It is an amenable number.

10000202121 is a deficient number, since it is larger than the sum of its proper divisors (8331956087).

10000202121 is a wasteful number, since it uses less digits than its factorization.

10000202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391 (or 1388 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10000202121 its reverse (12120200001), we get a palindrome (22120402122).

The spelling of 10000202121 in words is "ten billion, two hundred two thousand, one hundred twenty-one".