99121222222011 has 16 divisors (see below), whose sum is σ = 160195914702720. Its totient is φ = 60073468013160.

The previous prime is 99121222221953. The next prime is 99121222222031. The reversal of 99121222222011 is 11022222212199.

99121222222011 is a `hidden beast` number, since 99 + 121 + 2 + 222 + 220 + 1 + 1 = 666.

It is not a de Polignac number, because 99121222222011 - 2¹¹ = 99121222219963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99121222222031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166870744185 + ... + 166870744778.

It is an arithmetic number, because the mean of its divisors is an integer number (10012244668920).

Almost surely, 2^{99121222222011} is an apocalyptic number.

99121222222011 is a deficient number, since it is larger than the sum of its proper divisors (61074692480709).

99121222222011 is a wasteful number, since it uses less digits than its factorization.

99121222222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333741488983 (or 333741488977 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 99121222222011 in words is "ninety-nine trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-two thousand, eleven".