121000111222129 has 2 divisors, whose sum is σ = 121000111222130. Its totient is φ = 121000111222128.

The previous prime is 121000111221937. The next prime is 121000111222139. The reversal of 121000111222129 is 921222111000121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81435319319104 + 39564791903025 = 9024152^2 + 6290055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121000111222129 is a prime.

It is not a weakly prime, because it can be changed into another prime (121000111222139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500055611064 + 60500055611065.

It is an arithmetic number, because the mean of its divisors is an integer number (60500055611065).

Almost surely, 2^{121000111222129} is an apocalyptic number.

It is an amenable number.

121000111222129 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000111222129 is an equidigital number, since it uses as much as digits as its factorization.

121000111222129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 121000111222129 in words is "one hundred twenty-one trillion, one hundred eleven million, two hundred twenty-two thousand, one hundred twenty-nine".