121152111121 has 2 divisors, whose sum is σ = 121152111122. Its totient is φ = 121152111120.

The previous prime is 121152111109. The next prime is 121152111131. The reversal of 121152111121 is 121111251121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66853790721 + 54298320400 = 258561^2 + 233020^2 .

It is a cyclic number.

It is not a de Polignac number, because 121152111121 - 2¹⁷ = 121151980049 is a prime.

It is not a weakly prime, because it can be changed into another prime (121152111131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60576055560 + 60576055561.

It is an arithmetic number, because the mean of its divisors is an integer number (60576055561).

Almost surely, 2^121152111121 is an apocalyptic number.

It is an amenable number.

121152111121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121152111121 is an equidigital number, since it uses as much as digits as its factorization.

121152111121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40, while the sum is 19.

Adding to 121152111121 its reverse (121111251121), we get a palindrome (242263362242).

The spelling of 121152111121 in words is "one hundred twenty-one billion, one hundred fifty-two million, one hundred eleven thousand, one hundred twenty-one".