210211121202121 has 16 divisors (see below), whose sum is σ = 239728643884800. Its totient is φ = 182603317517568.

The previous prime is 210211121202083. The next prime is 210211121202149. The reversal of 210211121202121 is 121202121112012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 210211121202121 - 2²⁷ = 210210986984393 is a prime.

It is a super-2 number, since 2×210211121202121² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (210211121202151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59580631 + ... + 63010108.

It is an arithmetic number, because the mean of its divisors is an integer number (14983040242800).

Almost surely, 2^{210211121202121} is an apocalyptic number.

It is an amenable number.

210211121202121 is a deficient number, since it is larger than the sum of its proper divisors (29517522682679).

210211121202121 is a wasteful number, since it uses less digits than its factorization.

210211121202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122598528.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 210211121202121 its reverse (121202121112012), we get a palindrome (331413242314133).

The spelling of 210211121202121 in words is "two hundred ten trillion, two hundred eleven billion, one hundred twenty-one million, two hundred two thousand, one hundred twenty-one".