210122020202121 has 20 divisors (see below), whose sum is σ = 314227532572800. Its totient is φ = 139928918735736.

The previous prime is 210122020202027. The next prime is 210122020202137. The reversal of 210122020202121 is 121202020221012.

It is a happy number.

210122020202121 is a `hidden beast` number, since 2 + 101 + 220 + 20 + 202 + 121 = 666.

It is not a de Polignac number, because 210122020202121 - 2²⁷ = 210121885984393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210122020202094 and 210122020202103.

It is not an unprimeable number, because it can be changed into a prime (210122020252121) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1411296081 + ... + 1411444958.

It is an arithmetic number, because the mean of its divisors is an integer number (15711376628640).

Almost surely, 2^{210122020202121} is an apocalyptic number.

It is an amenable number.

210122020202121 is a deficient number, since it is larger than the sum of its proper divisors (104105512370679).

210122020202121 is an equidigital number, since it uses as much as digits as its factorization.

210122020202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822741970 (or 2822741961 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 210122020202121 its reverse (121202020221012), we get a palindrome (331324040423133).

The spelling of 210122020202121 in words is "two hundred ten trillion, one hundred twenty-two billion, twenty million, two hundred two thousand, one hundred twenty-one".