2112421420 has 24 divisors (see below), whose sum is σ = 4443516000. Its totient is φ = 843553152.

The previous prime is 2112421391. The next prime is 2112421429. The reversal of 2112421420 is 241242112.

It is not an unprimeable number, because it can be changed into a prime (2112421429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76185 + ... + 100144.

It is an arithmetic number, because the mean of its divisors is an integer number (185146500).

Almost surely, 2^2112421420 is an apocalyptic number.

2112421420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112421420 is an abundant number, since it is smaller than the sum of its proper divisors (2331094580).

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

2112421420 is a wasteful number, since it uses less digits than its factorization.

2112421420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176937 (or 176935 counting only the distinct ones).

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

The square root of 2112421420 is about 45961.0859314703. The cubic root of 2112421420 is about 1283.0990621260.

Adding to 2112421420 its reverse (241242112), we get a palindrome (2353663532).

The spelling of 2112421420 in words is "two billion, one hundred twelve million, four hundred twenty-one thousand, four hundred twenty".