2121112026 has 96 divisors (see below), whose sum is σ = 5412251520. Its totient is φ = 593577600.

The previous prime is 2121112013. The next prime is 2121112027. The reversal of 2121112026 is 6202111212.

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

It is not an unprimeable number, because it can be changed into a prime (2121112027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 124036 + ... + 140096.

It is an arithmetic number, because the mean of its divisors is an integer number (56377620).

Almost surely, 2^2121112026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121112026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2706125760).

2121112026 is an abundant number, since it is smaller than the sum of its proper divisors (3291139494).

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

2121112026 is a wasteful number, since it uses less digits than its factorization.

2121112026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16132 (or 16129 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 2121112026 is about 46055.5319804255. The cubic root of 2121112026 is about 1284.8562322565.

Adding to 2121112026 its reverse (6202111212), we get a palindrome (8323223238).

The spelling of 2121112026 in words is "two billion, one hundred twenty-one million, one hundred twelve thousand, twenty-six".