210211112012121 has 96 divisors (see below), whose sum is σ = 345315047645568. Its totient is φ = 122091992478720.

The previous prime is 210211112012119. The next prime is 210211112012141. The reversal of 210211112012121 is 121210211112012.

It is a happy number.

210211112012121 is a `hidden beast` number, since 210 + 21 + 111 + 201 + 2 + 121 = 666.

It is not a de Polignac number, because 210211112012121 - 2¹ = 210211112012119 is a prime.

It is a super-2 number, since 2×210211112012121² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210211112012094 and 210211112012103.

It is not an unprimeable number, because it can be changed into a prime (210211112012141) 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, 2129468661 + ... + 2129567373.

It is an arithmetic number, because the mean of its divisors is an integer number (3597031746308).

Almost surely, 2^{210211112012121} is an apocalyptic number.

It is an amenable number.

210211112012121 is a deficient number, since it is larger than the sum of its proper divisors (135103935633447).

210211112012121 is a wasteful number, since it uses less digits than its factorization.

210211112012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107511 (or 107508 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 210211112012121 its reverse (121210211112012), we get a palindrome (331421323124133).

It can be divided in two parts, 210211112012 and 121, that multiplied together give a palindrome (25435544553452).

The spelling of 210211112012121 in words is "two hundred ten trillion, two hundred eleven billion, one hundred twelve million, twelve thousand, one hundred twenty-one".