2121012344 has 64 divisors (see below), whose sum is σ = 4793437440. Its totient is φ = 867919360.

The previous prime is 2121012329. The next prime is 2121012347. The reversal of 2121012344 is 4432101212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121012347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3587 + ... + 65229.

It is an arithmetic number, because the mean of its divisors is an integer number (74897460).

Almost surely, 2^2121012344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121012344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2396718720).

2121012344 is an abundant number, since it is smaller than the sum of its proper divisors (2672425096).

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

2121012344 is a wasteful number, since it uses less digits than its factorization.

2121012344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61700 (or 61696 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2121012344 is about 46054.4497741532. The cubic root of 2121012344 is about 1284.8361045996.

Adding to 2121012344 its reverse (4432101212), we get a palindrome (6553113556).

The spelling of 2121012344 in words is "two billion, one hundred twenty-one million, twelve thousand, three hundred forty-four".