121311120001121 has 2 divisors, whose sum is σ = 121311120001122. Its totient is φ = 121311120001120.

The previous prime is 121311120001033. The next prime is 121311120001163. The reversal of 121311120001121 is 121100021113121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120589828195600 + 721291805521 = 10981340^2 + 849289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121311120001121 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121311120001121.

It is not a weakly prime, because it can be changed into another prime (121311120004121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60655560000560 + 60655560000561.

It is an arithmetic number, because the mean of its divisors is an integer number (60655560000561).

Almost surely, 2^{121311120001121} is an apocalyptic number.

It is an amenable number.

121311120001121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121311120001121 is an equidigital number, since it uses as much as digits as its factorization.

121311120001121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 121311120001121 its reverse (121100021113121), we get a palindrome (242411141114242).

It can be divided in two parts, 12131112000 and 1121, that added together give a palindrome (12131113121).

The spelling of 121311120001121 in words is "one hundred twenty-one trillion, three hundred eleven billion, one hundred twenty million, one thousand, one hundred twenty-one".