2121442340 has 48 divisors (see below), whose sum is σ = 4700747520. Its totient is φ = 801987840.

The previous prime is 2121442331. The next prime is 2121442357. The reversal of 2121442340 is 432441212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157304 + ... + 170256.

It is an arithmetic number, because the mean of its divisors is an integer number (97932240).

Almost surely, 2^2121442340 is an apocalyptic number.

2121442340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121442340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2350373760).

2121442340 is an abundant number, since it is smaller than the sum of its proper divisors (2579305180).

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

2121442340 is a wasteful number, since it uses less digits than its factorization.

2121442340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13412 (or 13410 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 2121442340 is about 46059.1178812621. The cubic root of 2121442340 is about 1284.9229243136.

Adding to 2121442340 its reverse (432441212), we get a palindrome (2553883552).

The spelling of 2121442340 in words is "two billion, one hundred twenty-one million, four hundred forty-two thousand, three hundred forty".