10202121212121 has 24 divisors (see below), whose sum is σ = 15151365288384. Its totient is φ = 6610295809440.

The previous prime is 10202121212119. The next prime is 10202121212161. The reversal of 10202121212121 is 12121212120201.

10202121212121 is a `hidden beast` number, since 10 + 202 + 121 + 212 + 121 = 666.

It is not a de Polignac number, because 10202121212121 - 2¹ = 10202121212119 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10202121212094 and 10202121212103.

It is not an unprimeable number, because it can be changed into a prime (10202121212161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16587165 + ... + 17191226.

It is an arithmetic number, because the mean of its divisors is an integer number (631306887016).

Almost surely, 2^{10202121212121} is an apocalyptic number.

It is an amenable number.

10202121212121 is a deficient number, since it is larger than the sum of its proper divisors (4949244076263).

10202121212121 is a wasteful number, since it uses less digits than its factorization.

10202121212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33779341 (or 33779338 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 10202121212121 its reverse (12121212120201), we get a palindrome (22323333332322).

The spelling of 10202121212121 in words is "ten trillion, two hundred two billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty-one".