4273120021 has 4 divisors (see below), whose sum is σ = 4458907872. Its totient is φ = 4087332172.

The previous prime is 4273119971. The next prime is 4273120031. The reversal of 4273120021 is 1200213724.

4273120021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 4273120021 - 2¹⁵ = 4273087253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4273119974 and 4273120001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4273120031) 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, 92893891 + ... + 92893936.

It is an arithmetic number, because the mean of its divisors is an integer number (1114726968).

Almost surely, 2^4273120021 is an apocalyptic number.

It is an amenable number.

4273120021 is a deficient number, since it is larger than the sum of its proper divisors (185787851).

4273120021 is a wasteful number, since it uses less digits than its factorization.

4273120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185787850.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 4273120021 is about 65369.1060134679. The cubic root of 4273120021 is about 1622.7378411593.

Adding to 4273120021 its reverse (1200213724), we get a palindrome (5473333745).

The spelling of 4273120021 in words is "four billion, two hundred seventy-three million, one hundred twenty thousand, twenty-one".