121021211120129 has 2 divisors, whose sum is σ = 121021211120130. Its totient is φ = 121021211120128.

The previous prime is 121021211120057. The next prime is 121021211120197. The reversal of 121021211120129 is 921021112120121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60746794524529 + 60274416595600 = 7794023^2 + 7763660^2 .

It is a cyclic number.

It is not a de Polignac number, because 121021211120129 - 2⁴⁴ = 103429025075713 is a prime.

It is a super-2 number, since 2×121021211120129² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121021211120098 and 121021211120107.

It is not a weakly prime, because it can be changed into another prime (121021211122129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510605560064 + 60510605560065.

It is an arithmetic number, because the mean of its divisors is an integer number (60510605560065).

Almost surely, 2^{121021211120129} is an apocalyptic number.

It is an amenable number.

121021211120129 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021211120129 is an equidigital number, since it uses as much as digits as its factorization.

121021211120129 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 26.

The spelling of 121021211120129 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred eleven million, one hundred twenty thousand, one hundred twenty-nine".