4002110521 has 2 divisors, whose sum is σ = 4002110522. Its totient is φ = 4002110520.

The previous prime is 4002110503. The next prime is 4002110569. The reversal of 4002110521 is 1250112004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3250254121 + 751856400 = 57011^2 + 27420^2 .

It is a cyclic number.

It is not a de Polignac number, because 4002110521 - 2¹³ = 4002102329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4002110495 and 4002110504.

It is not a weakly prime, because it can be changed into another prime (4002110501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001055260 + 2001055261.

It is an arithmetic number, because the mean of its divisors is an integer number (2001055261).

Almost surely, 2^4002110521 is an apocalyptic number.

It is an amenable number.

4002110521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002110521 is an equidigital number, since it uses as much as digits as its factorization.

4002110521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 4002110521 is about 63262.2361365768. The cubic root of 4002110521 is about 1587.6801898181.

Adding to 4002110521 its reverse (1250112004), we get a palindrome (5252222525).

The spelling of 4002110521 in words is "four billion, two million, one hundred ten thousand, five hundred twenty-one".