121355406020099 has 2 divisors, whose sum is σ = 121355406020100. Its totient is φ = 121355406020098.

The previous prime is 121355406020071. The next prime is 121355406020131. The reversal of 121355406020099 is 990020604553121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121355406020099 - 2²⁴ = 121355389242883 is a prime.

It is a super-2 number, since 2×121355406020099² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121355406020059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60677703010049 + 60677703010050.

It is an arithmetic number, because the mean of its divisors is an integer number (60677703010050).

Almost surely, 2^{121355406020099} is an apocalyptic number.

121355406020099 is a deficient number, since it is larger than the sum of its proper divisors (1).

121355406020099 is an equidigital number, since it uses as much as digits as its factorization.

121355406020099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 47.

The spelling of 121355406020099 in words is "one hundred twenty-one trillion, three hundred fifty-five billion, four hundred six million, twenty thousand, ninety-nine".