121131213311 has 2 divisors, whose sum is σ = 121131213312. Its totient is φ = 121131213310.

The previous prime is 121131213277. The next prime is 121131213389. The reversal of 121131213311 is 113312131121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121131213311 - 2³⁰ = 120057471487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121131213011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60565606655 + 60565606656.

It is an arithmetic number, because the mean of its divisors is an integer number (60565606656).

Almost surely, 2^121131213311 is an apocalyptic number.

121131213311 is a deficient number, since it is larger than the sum of its proper divisors (1).

121131213311 is an equidigital number, since it uses as much as digits as its factorization.

121131213311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 20.

Adding to 121131213311 its reverse (113312131121), we get a palindrome (234443344432).

The spelling of 121131213311 in words is "one hundred twenty-one billion, one hundred thirty-one million, two hundred thirteen thousand, three hundred eleven".