4021521341 has 2 divisors, whose sum is σ = 4021521342. Its totient is φ = 4021521340.

The previous prime is 4021521313. The next prime is 4021521347. The reversal of 4021521341 is 1431251204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3020052025 + 1001469316 = 54955^2 + 31646^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021521341 - 2¹⁰ = 4021520317 is a prime.

It is a super-2 number, since 2×4021521341² = 32345267792236876562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021521347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010760670 + 2010760671.

It is an arithmetic number, because the mean of its divisors is an integer number (2010760671).

Almost surely, 2^4021521341 is an apocalyptic number.

It is an amenable number.

4021521341 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021521341 is an equidigital number, since it uses as much as digits as its factorization.

4021521341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 4021521341 is about 63415.4661025211. The cubic root of 4021521341 is about 1590.2428779986.

Adding to 4021521341 its reverse (1431251204), we get a palindrome (5452772545).

The spelling of 4021521341 in words is "four billion, twenty-one million, five hundred twenty-one thousand, three hundred forty-one".