121212323311 has 2 divisors, whose sum is σ = 121212323312. Its totient is φ = 121212323310.

The previous prime is 121212323249. The next prime is 121212323333. The reversal of 121212323311 is 113323212121.

It is an a-pointer prime, because the next prime (121212323333) can be obtained adding 121212323311 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121212323311 - 2¹⁷ = 121212192239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121212323711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606161655 + 60606161656.

It is an arithmetic number, because the mean of its divisors is an integer number (60606161656).

Almost surely, 2^121212323311 is an apocalyptic number.

121212323311 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212323311 is an equidigital number, since it uses as much as digits as its factorization.

121212323311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 22.

Adding to 121212323311 its reverse (113323212121), we get a palindrome (234535535432).

The spelling of 121212323311 in words is "one hundred twenty-one billion, two hundred twelve million, three hundred twenty-three thousand, three hundred eleven".