121211110771 has 2 divisors, whose sum is σ = 121211110772. Its totient is φ = 121211110770.

The previous prime is 121211110759. The next prime is 121211110781. The reversal of 121211110771 is 177011112121.

It is a strong prime.

It is an emirp because it is prime and its reverse (177011112121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121211110771 - 2⁹ = 121211110259 is a prime.

It is not a weakly prime, because it can be changed into another prime (121211110781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605555385 + 60605555386.

It is an arithmetic number, because the mean of its divisors is an integer number (60605555386).

Almost surely, 2^121211110771 is an apocalyptic number.

121211110771 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211110771 is an equidigital number, since it uses as much as digits as its factorization.

121211110771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196, while the sum is 25.

Adding to 121211110771 its reverse (177011112121), we get a palindrome (298222222892).

The spelling of 121211110771 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred ten thousand, seven hundred seventy-one".