211110002202121 has 24 divisors (see below), whose sum is σ = 240104754577800. Its totient is φ = 185256609753600.

The previous prime is 211110002202097. The next prime is 211110002202167. The reversal of 211110002202121 is 121202200011112.

It can be written as a sum of positive squares in 4 ways, for example, as 72779001785721 + 138331000416400 = 8531061^2 + 11761420^2 .

It is not a de Polignac number, because 211110002202121 - 2⁵ = 211110002202089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211110002202095 and 211110002202104.

It is not an unprimeable number, because it can be changed into a prime (211110002202191) 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, 7788715 + ... + 21974623.

It is an arithmetic number, because the mean of its divisors is an integer number (10004364774075).

Almost surely, 2^{211110002202121} is an apocalyptic number.

It is an amenable number.

211110002202121 is a deficient number, since it is larger than the sum of its proper divisors (28994752375679).

211110002202121 is a wasteful number, since it uses less digits than its factorization.

211110002202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14190201 (or 14190190 counting only the distinct ones).

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

Adding to 211110002202121 its reverse (121202200011112), we get a palindrome (332312202213233).

The spelling of 211110002202121 in words is "two hundred eleven trillion, one hundred ten billion, two million, two hundred two thousand, one hundred twenty-one".