2110001210991 has 6 divisors (see below), whose sum is σ = 3047779527000. Its totient is φ = 1406667473988.

The previous prime is 2110001210957. The next prime is 2110001211013. The reversal of 2110001210991 is 1990121000112.

It is not a de Polignac number, because 2110001210991 - 2¹⁷ = 2110001079919 is a prime.

It is a super-2 number, since 2×2110001210991² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2110001210591) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117222289491 + ... + 117222289508.

It is an arithmetic number, because the mean of its divisors is an integer number (507963254500).

Almost surely, 2^{2110001210991} is an apocalyptic number.

2110001210991 is a deficient number, since it is larger than the sum of its proper divisors (937778316009).

2110001210991 is a wasteful number, since it uses less digits than its factorization.

2110001210991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234444579005 (or 234444579002 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 27.

The spelling of 2110001210991 in words is "two trillion, one hundred ten billion, one million, two hundred ten thousand, nine hundred ninety-one".