211122101121121 has 4 divisors (see below), whose sum is σ = 212193786913812. Its totient is φ = 210050415328432.

The previous prime is 211122101121097. The next prime is 211122101121161. The reversal of 211122101121121 is 121121101221112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 172960347770721 + 38161753350400 = 13151439^2 + 6177520^2 .

It is a cyclic number.

It is not a de Polignac number, because 211122101121121 - 2²⁵ = 211122067566689 is a prime.

It is a super-2 number, since 2×211122101121121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211122101121161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535842896050 + ... + 535842896443.

It is an arithmetic number, because the mean of its divisors is an integer number (53048446728453).

Almost surely, 2^{211122101121121} is an apocalyptic number.

It is an amenable number.

211122101121121 is a deficient number, since it is larger than the sum of its proper divisors (1071685792691).

211122101121121 is a wasteful number, since it uses less digits than its factorization.

211122101121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071685792690.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 211122101121121 its reverse (121121101221112), we get a palindrome (332243202342233).

Subtracting from 211122101121121 its reverse (121121101221112), we obtain a palindrome (90000999900009).

The spelling of 211122101121121 in words is "two hundred eleven trillion, one hundred twenty-two billion, one hundred one million, one hundred twenty-one thousand, one hundred twenty-one".