2121322124340 has 144 divisors (see below), whose sum is σ = 6784509688320. Its totient is φ = 535029546240.

The previous prime is 2121322124309. The next prime is 2121322124351. The reversal of 2121322124340 is 434212231212.

2121322124340 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 3 + 221 + 2 + 434 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1565010 + ... + 2586870.

Almost surely, 2^{2121322124340} is an apocalyptic number.

2121322124340 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 2121322124340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3392254844160).

2121322124340 is an abundant number, since it is smaller than the sum of its proper divisors (4663187563980).

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

2121322124340 is a wasteful number, since it uses less digits than its factorization.

2121322124340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022502 (or 1022497 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 2121322124340 its reverse (434212231212), we get a palindrome (2555534355552).

The spelling of 2121322124340 in words is "two trillion, one hundred twenty-one billion, three hundred twenty-two million, one hundred twenty-four thousand, three hundred forty".