2121231006 has 48 divisors (see below), whose sum is σ = 4639671504. Its totient is φ = 700382592.

The previous prime is 2121231001. The next prime is 2121231011. The reversal of 2121231006 is 6001321212.

It is an interprime number because it is at equal distance from previous prime (2121231001) and next prime (2121231011).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 2121231006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121231001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1940196 + ... + 1941288.

It is an arithmetic number, because the mean of its divisors is an integer number (96659823).

Almost surely, 2^2121231006 is an apocalyptic number.

2121231006 is an abundant number, since it is smaller than the sum of its proper divisors (2518440498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121231006 is a wasteful number, since it uses less digits than its factorization.

2121231006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2025 (or 2022 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2121231006 is about 46056.8236638177. The cubic root of 2121231006 is about 1284.8802557144.

Adding to 2121231006 its reverse (6001321212), we get a palindrome (8122552218).

The spelling of 2121231006 in words is "two billion, one hundred twenty-one million, two hundred thirty-one thousand, six".