99477191121 has 64 divisors (see below), whose sum is σ = 170774962176. Its totient is φ = 50001235200.

The previous prime is 99477191111. The next prime is 99477191137. The reversal of 99477191121 is 12119177499.

It is a happy number.

It is not a de Polignac number, because 99477191121 - 2¹⁵ = 99477158353 is a prime.

It is a super-2 number, since 2×99477191121² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99477191111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1514856 + ... + 1579158.

It is an arithmetic number, because the mean of its divisors is an integer number (2668358784).

Almost surely, 2^99477191121 is an apocalyptic number.

It is an amenable number.

99477191121 is a deficient number, since it is larger than the sum of its proper divisors (71297771055).

99477191121 is a wasteful number, since it uses less digits than its factorization.

99477191121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64542.

The product of its digits is 285768, while the sum is 51.

The spelling of 99477191121 in words is "ninety-nine billion, four hundred seventy-seven million, one hundred ninety-one thousand, one hundred twenty-one".