121122111222211 has 16 divisors (see below), whose sum is σ = 132591943905120. Its totient is φ = 109728777841920.

The previous prime is 121122111222173. The next prime is 121122111222251. The reversal of 121122111222211 is 112222111221121.

It is a cyclic number.

It is not a de Polignac number, because 121122111222211 - 2³¹ = 121119963738563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121122111222251) 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, 54372721 + ... + 56556493.

It is an arithmetic number, because the mean of its divisors is an integer number (8286996494070).

Almost surely, 2^{121122111222211} is an apocalyptic number.

121122111222211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121122111222211 is a deficient number, since it is larger than the sum of its proper divisors (11469832682909).

121122111222211 is a wasteful number, since it uses less digits than its factorization.

121122111222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201286.

The product of its digits is 128, while the sum is 22.

Adding to 121122111222211 its reverse (112222111221121), we get a palindrome (233344222443332).

The spelling of 121122111222211 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, one hundred eleven million, two hundred twenty-two thousand, two hundred eleven".