2121021244 has 12 divisors (see below), whose sum is σ = 3723724368. Its totient is φ = 1057100000.

The previous prime is 2121021241. The next prime is 2121021247. The reversal of 2121021244 is 4421201212.

It is an interprime number because it is at equal distance from previous prime (2121021241) and next prime (2121021247).

It is a super-2 number, since 2×2121021244² = 8997462234998615072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121021241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851257 + ... + 853744.

It is an arithmetic number, because the mean of its divisors is an integer number (310310364).

Almost surely, 2^2121021244 is an apocalyptic number.

It is an amenable number.

2121021244 is a deficient number, since it is larger than the sum of its proper divisors (1602703124).

2121021244 is a wasteful number, since it uses less digits than its factorization.

2121021244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705316 (or 1705314 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 2121021244 is about 46054.5463988084. The cubic root of 2121021244 is about 1284.8379017014.

Adding to 2121021244 its reverse (4421201212), we get a palindrome (6542222456).

The spelling of 2121021244 in words is "two billion, one hundred twenty-one million, twenty-one thousand, two hundred forty-four".