211011202121121 has 48 divisors (see below), whose sum is σ = 321054314974848. Its totient is φ = 133372311609600.

The previous prime is 211011202121051. The next prime is 211011202121149. The reversal of 211011202121121 is 121121202110112.

It is a happy number.

211011202121121 is a `hidden beast` number, since 211 + 0 + 1 + 120 + 212 + 1 + 121 = 666.

It is not a de Polignac number, because 211011202121121 - 2¹⁴ = 211011202104737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211011202121094 and 211011202121103.

It is not an unprimeable number, because it can be changed into a prime (211011202121171) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1946836 + ... + 20635226.

It is an arithmetic number, because the mean of its divisors is an integer number (6688631561976).

Almost surely, 2^{211011202121121} is an apocalyptic number.

It is an amenable number.

211011202121121 is a deficient number, since it is larger than the sum of its proper divisors (110043112853727).

211011202121121 is a wasteful number, since it uses less digits than its factorization.

211011202121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18689302 (or 18689299 counting only the distinct ones).

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

Adding to 211011202121121 its reverse (121121202110112), we get a palindrome (332132404231233).

The spelling of 211011202121121 in words is "two hundred eleven trillion, eleven billion, two hundred two million, one hundred twenty-one thousand, one hundred twenty-one".