2120112421 has 4 divisors (see below), whose sum is σ = 2422985632. Its totient is φ = 1817239212.

The previous prime is 2120112389. The next prime is 2120112439. The reversal of 2120112421 is 1242110212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2120112421 - 2⁵ = 2120112389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120112395 and 2120112404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120112461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151436595 + ... + 151436608.

It is an arithmetic number, because the mean of its divisors is an integer number (605746408).

Almost surely, 2^2120112421 is an apocalyptic number.

It is an amenable number.

2120112421 is a deficient number, since it is larger than the sum of its proper divisors (302873211).

2120112421 is an equidigital number, since it uses as much as digits as its factorization.

2120112421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302873210.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2120112421 is about 46044.6785307488. The cubic root of 2120112421 is about 1284.6543647915.

Adding to 2120112421 its reverse (1242110212), we get a palindrome (3362222633).

The spelling of 2120112421 in words is "two billion, one hundred twenty million, one hundred twelve thousand, four hundred twenty-one".