4121273021 has 4 divisors (see below), whose sum is σ = 4254217344. Its totient is φ = 3988328700.

The previous prime is 4121273017. The next prime is 4121273053. The reversal of 4121273021 is 1203721214.

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 4121273021 - 2² = 4121273017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4121273081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66472115 + ... + 66472176.

It is an arithmetic number, because the mean of its divisors is an integer number (1063554336).

Almost surely, 2^4121273021 is an apocalyptic number.

It is an amenable number.

4121273021 is a deficient number, since it is larger than the sum of its proper divisors (132944323).

4121273021 is a wasteful number, since it uses less digits than its factorization.

4121273021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132944322.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 4121273021 is about 64197.1418444778. The cubic root of 4121273021 is about 1603.2840128683.

Adding to 4121273021 its reverse (1203721214), we get a palindrome (5324994235).

The spelling of 4121273021 in words is "four billion, one hundred twenty-one million, two hundred seventy-three thousand, twenty-one".