2112149802021 has 16 divisors (see below), whose sum is σ = 3279240664704. Its totient is φ = 1184170238784.

The previous prime is 2112149801947. The next prime is 2112149802043. The reversal of 2112149802021 is 1202089412112.

It is not a de Polignac number, because 2112149802021 - 2²¹ = 2112147704869 is a prime.

It is a super-2 number, since 2×2112149802021² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112149803021) 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, 948853246 + ... + 948855471.

It is an arithmetic number, because the mean of its divisors is an integer number (204952541544).

Almost surely, 2^{2112149802021} is an apocalyptic number.

2112149802021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2112149802021 is a deficient number, since it is larger than the sum of its proper divisors (1167090862683).

2112149802021 is a wasteful number, since it uses less digits than its factorization.

2112149802021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897708780.

The product of its (nonzero) digits is 4608, while the sum is 33.

The spelling of 2112149802021 in words is "two trillion, one hundred twelve billion, one hundred forty-nine million, eight hundred two thousand, twenty-one".