211211202121 has 8 divisors (see below), whose sum is σ = 224528846400. Its totient is φ = 198113684400.

The previous prime is 211211202109. The next prime is 211211202161. The reversal of 211211202121 is 121202112112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211211202121 - 2¹⁹ = 211210677833 is a prime.

It is a super-2 number, since 2×211211202121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211211202095 and 211211202104.

It is not an unprimeable number, because it can be changed into a prime (211211202101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55029661 + ... + 55033498.

It is an arithmetic number, because the mean of its divisors is an integer number (28066105800).

Almost surely, 2^211211202121 is an apocalyptic number.

It is an amenable number.

211211202121 is a deficient number, since it is larger than the sum of its proper divisors (13317644279).

211211202121 is a wasteful number, since it uses less digits than its factorization.

211211202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110063279.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211211202121 its reverse (121202112112), we get a palindrome (332413314233).

Subtracting from 211211202121 its reverse (121202112112), we obtain a palindrome (90009090009).

The spelling of 211211202121 in words is "two hundred eleven billion, two hundred eleven million, two hundred two thousand, one hundred twenty-one".