121122111211 has 2 divisors, whose sum is σ = 121122111212. Its totient is φ = 121122111210.

The previous prime is 121122111193. The next prime is 121122111217. The reversal of 121122111211 is 112111221121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121122111211 - 2¹³ = 121122103019 is a prime.

It is not a weakly prime, because it can be changed into another prime (121122111217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60561055605 + 60561055606.

It is an arithmetic number, because the mean of its divisors is an integer number (60561055606).

Almost surely, 2^121122111211 is an apocalyptic number.

121122111211 is a deficient number, since it is larger than the sum of its proper divisors (1).

121122111211 is an equidigital number, since it uses as much as digits as its factorization.

121122111211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16, while the sum is 16.

Adding to 121122111211 its reverse (112111221121), we get a palindrome (233233332332).

The spelling of 121122111211 in words is "one hundred twenty-one billion, one hundred twenty-two million, one hundred eleven thousand, two hundred eleven".