211121102122111 has 16 divisors (see below), whose sum is σ = 213289947652320. Its totient is φ = 208961405677440.

The previous prime is 211121102122087. The next prime is 211121102122121. The reversal of 211121102122111 is 111221201121112.

It is a cyclic number.

It is not a de Polignac number, because 211121102122111 - 2¹¹ = 211121102120063 is a prime.

It is a super-2 number, since 2×211121102122111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121102122121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76421305 + ... + 79135693.

It is an arithmetic number, because the mean of its divisors is an integer number (13330621728270).

Almost surely, 2^{211121102122111} is an apocalyptic number.

211121102122111 is a deficient number, since it is larger than the sum of its proper divisors (2168845530209).

211121102122111 is a wasteful number, since it uses less digits than its factorization.

211121102122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716074.

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

Adding to 211121102122111 its reverse (111221201121112), we get a palindrome (322342303243223).

The spelling of 211121102122111 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred two million, one hundred twenty-two thousand, one hundred eleven".