2100121120099 has 2 divisors, whose sum is σ = 2100121120100. Its totient is φ = 2100121120098.

The previous prime is 2100121120067. The next prime is 2100121120103. The reversal of 2100121120099 is 9900211210012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2100121120099 - 2⁵ = 2100121120067 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100121120199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050060560049 + 1050060560050.

It is an arithmetic number, because the mean of its divisors is an integer number (1050060560050).

Almost surely, 2^{2100121120099} is an apocalyptic number.

2100121120099 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100121120099 is an equidigital number, since it uses as much as digits as its factorization.

2100121120099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 2100121120099 in words is "two trillion, one hundred billion, one hundred twenty-one million, one hundred twenty thousand, ninety-nine".