98991121211 has 8 divisors (see below), whose sum is σ = 100126773264. Its totient is φ = 97858519200.

The previous prime is 98991121199. The next prime is 98991121217. The reversal of 98991121211 is 11212119989.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 98991121211 - 2¹⁸ = 98990859067 is a prime.

It is a super-2 number, since 2×98991121211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98991121217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 697196 + ... + 827081.

It is an arithmetic number, because the mean of its divisors is an integer number (12515846658).

Almost surely, 2^98991121211 is an apocalyptic number.

98991121211 is a deficient number, since it is larger than the sum of its proper divisors (1135652053).

98991121211 is a wasteful number, since it uses less digits than its factorization.

98991121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525021.

The product of its digits is 23328, while the sum is 44.

The spelling of 98991121211 in words is "ninety-eight billion, nine hundred ninety-one million, one hundred twenty-one thousand, two hundred eleven".