2120016421 has 4 divisors (see below), whose sum is σ = 2212191072. Its totient is φ = 2027841772.

The previous prime is 2120016419. The next prime is 2120016511. The reversal of 2120016421 is 1246100212.

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 2120016421 - 2¹ = 2120016419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120016221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46087291 + ... + 46087336.

It is an arithmetic number, because the mean of its divisors is an integer number (553047768).

Almost surely, 2^2120016421 is an apocalyptic number.

It is an amenable number.

2120016421 is a deficient number, since it is larger than the sum of its proper divisors (92174651).

2120016421 is an equidigital number, since it uses as much as digits as its factorization.

2120016421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92174650.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2120016421 is about 46043.6360532050. The cubic root of 2120016421 is about 1284.6349745178.

Adding to 2120016421 its reverse (1246100212), we get a palindrome (3366116633).

The spelling of 2120016421 in words is "two billion, one hundred twenty million, sixteen thousand, four hundred twenty-one".