121131236211121 has 2 divisors, whose sum is σ = 121131236211122. Its totient is φ = 121131236211120.

The previous prime is 121131236211079. The next prime is 121131236211199. The reversal of 121131236211121 is 121112632131121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121020570874225 + 110665336896 = 11000935^2 + 332664^2 .

It is a cyclic number.

It is not a de Polignac number, because 121131236211121 - 2¹⁵ = 121131236178353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121131236211121.

It is not a weakly prime, because it can be changed into another prime (121131236271121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60565618105560 + 60565618105561.

It is an arithmetic number, because the mean of its divisors is an integer number (60565618105561).

Almost surely, 2^{121131236211121} is an apocalyptic number.

It is an amenable number.

121131236211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121131236211121 is an equidigital number, since it uses as much as digits as its factorization.

121131236211121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 28.

Adding to 121131236211121 its reverse (121112632131121), we get a palindrome (242243868342242).

The spelling of 121131236211121 in words is "one hundred twenty-one trillion, one hundred thirty-one billion, two hundred thirty-six million, two hundred eleven thousand, one hundred twenty-one".