4023151021 has 2 divisors, whose sum is σ = 4023151022. Its totient is φ = 4023151020.

The previous prime is 4023151009. The next prime is 4023151037. The reversal of 4023151021 is 1201513204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2634768900 + 1388382121 = 51330^2 + 37261^2 .

It is a cyclic number.

It is not a de Polignac number, because 4023151021 - 2¹³ = 4023142829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4023151021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4023151001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2011575510 + 2011575511.

It is an arithmetic number, because the mean of its divisors is an integer number (2011575511).

Almost surely, 2^4023151021 is an apocalyptic number.

It is an amenable number.

4023151021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4023151021 is an equidigital number, since it uses as much as digits as its factorization.

4023151021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 4023151021 is about 63428.3140324571. The cubic root of 4023151021 is about 1590.4576588242.

Adding to 4023151021 its reverse (1201513204), we get a palindrome (5224664225).

The spelling of 4023151021 in words is "four billion, twenty-three million, one hundred fifty-one thousand, twenty-one".