4120621021 has 4 divisors (see below), whose sum is σ = 4495222944. Its totient is φ = 3746019100.

The previous prime is 4120621019. The next prime is 4120621093. The reversal of 4120621021 is 1201260214.

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 4120621021 - 2¹ = 4120621019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4120621021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4120621621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187300945 + ... + 187300966.

It is an arithmetic number, because the mean of its divisors is an integer number (1123805736).

Almost surely, 2^4120621021 is an apocalyptic number.

It is an amenable number.

4120621021 is a deficient number, since it is larger than the sum of its proper divisors (374601923).

4120621021 is a wasteful number, since it uses less digits than its factorization.

4120621021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374601922.

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

The square root of 4120621021 is about 64192.0635359232. The cubic root of 4120621021 is about 1603.1994600047.

Adding to 4120621021 its reverse (1201260214), we get a palindrome (5321881235).

The spelling of 4120621021 in words is "four billion, one hundred twenty million, six hundred twenty-one thousand, twenty-one".