121200021100027 has 2 divisors, whose sum is σ = 121200021100028. Its totient is φ = 121200021100026.

The previous prime is 121200021100013. The next prime is 121200021100049. The reversal of 121200021100027 is 720001120002121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121200021100027 is a prime.

It is a super-2 number, since 2×121200021100027² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121200021099977 and 121200021100013.

It is not a weakly prime, because it can be changed into another prime (121200021100057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600010550013 + 60600010550014.

It is an arithmetic number, because the mean of its divisors is an integer number (60600010550014).

Almost surely, 2^{121200021100027} is an apocalyptic number.

121200021100027 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200021100027 is an equidigital number, since it uses as much as digits as its factorization.

121200021100027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 121200021100027 its reverse (720001120002121), we get a palindrome (841201141102148).

The spelling of 121200021100027 in words is "one hundred twenty-one trillion, two hundred billion, twenty-one million, one hundred thousand, twenty-seven".