121211000100099 has 72 divisors (see below), whose sum is σ = 225262535752800. Its totient is φ = 61155669206016.

The previous prime is 121211000099993. The next prime is 121211000100103. The reversal of 121211000100099 is 990001000112121.

It is not a de Polignac number, because 121211000100099 - 2⁷ = 121211000099971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121211000100499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 139452174 + ... + 140318675.

It is an arithmetic number, because the mean of its divisors is an integer number (3128646329900).

Almost surely, 2^{121211000100099} is an apocalyptic number.

121211000100099 is a deficient number, since it is larger than the sum of its proper divisors (104051535652701).

121211000100099 is a wasteful number, since it uses less digits than its factorization.

121211000100099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279770921 (or 279770895 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 27.

The spelling of 121211000100099 in words is "one hundred twenty-one trillion, two hundred eleven billion, one hundred thousand, ninety-nine".