99911100121 has 16 divisors (see below), whose sum is σ = 118296138240. Its totient is φ = 82562800320.

The previous prime is 99911100109. The next prime is 99911100131. The reversal of 99911100121 is 12100111999.

It is not a de Polignac number, because 99911100121 - 2¹⁷ = 99910969049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99911100131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226065 + ... + 500926.

It is an arithmetic number, because the mean of its divisors is an integer number (7393508640).

Almost surely, 2^99911100121 is an apocalyptic number.

It is an amenable number.

99911100121 is a deficient number, since it is larger than the sum of its proper divisors (18385038119).

99911100121 is a wasteful number, since it uses less digits than its factorization.

99911100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727704.

The product of its (nonzero) digits is 1458, while the sum is 34.

The spelling of 99911100121 in words is "ninety-nine billion, nine hundred eleven million, one hundred thousand, one hundred twenty-one".