121200000100051 has 2 divisors, whose sum is σ = 121200000100052. Its totient is φ = 121200000100050.

The previous prime is 121200000100007. The next prime is 121200000100079. The reversal of 121200000100051 is 150001000002121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121200000100051 - 2²¹ = 121199998002899 is a prime.

It is not a weakly prime, because it can be changed into another prime (121200000100351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600000050025 + 60600000050026.

It is an arithmetic number, because the mean of its divisors is an integer number (60600000050026).

Almost surely, 2^{121200000100051} is an apocalyptic number.

121200000100051 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200000100051 is an equidigital number, since it uses as much as digits as its factorization.

121200000100051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 13.

Adding to 121200000100051 its reverse (150001000002121), we get a palindrome (271201000102172).

The spelling of 121200000100051 in words is "one hundred twenty-one trillion, two hundred billion, one hundred thousand, fifty-one".