121121011211 has 2 divisors, whose sum is σ = 121121011212. Its totient is φ = 121121011210.

The previous prime is 121121011157. The next prime is 121121011223. The reversal of 121121011211 is 112110121121.

It is a strong prime.

It is an emirp because it is prime and its reverse (112110121121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121121011211 is a prime.

It is not a weakly prime, because it can be changed into another prime (121121011111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560505605 + 60560505606.

It is an arithmetic number, because the mean of its divisors is an integer number (60560505606).

Almost surely, 2^121121011211 is an apocalyptic number.

121121011211 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121011211 is an equidigital number, since it uses as much as digits as its factorization.

121121011211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121121011211 its reverse (112110121121), we get a palindrome (233231132332).

The spelling of 121121011211 in words is "one hundred twenty-one billion, one hundred twenty-one million, eleven thousand, two hundred eleven".