99010121 has 32 divisors (see below), whose sum is σ = 124293120. Its totient is φ = 76982400.

The previous prime is 99010103. The next prime is 99010129. The reversal of 99010121 is 12101099.

It is a cyclic number.

It is not a de Polignac number, because 99010121 - 2¹⁸ = 98747977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99010129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 365216 + ... + 365486.

It is an arithmetic number, because the mean of its divisors is an integer number (3884160).

Almost surely, 2^99010121 is an apocalyptic number.

It is an amenable number.

99010121 is a deficient number, since it is larger than the sum of its proper divisors (25282999).

99010121 is a wasteful number, since it uses less digits than its factorization.

99010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 99010121 is about 9950.3829574545. The cubic root of 99010121 is about 462.6222648269.

It can be divided in two parts, 990 and 10121, that added together give a palindrome (11111).

The spelling of 99010121 in words is "ninety-nine million, ten thousand, one hundred twenty-one".