4002141421 has 2 divisors, whose sum is σ = 4002141422. Its totient is φ = 4002141420.

The previous prime is 4002141389. The next prime is 4002141431. The reversal of 4002141421 is 1241412004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3491155396 + 510986025 = 59086^2 + 22605^2 .

It is a cyclic number.

It is not a de Polignac number, because 4002141421 - 2⁵ = 4002141389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4002141431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001070710 + 2001070711.

It is an arithmetic number, because the mean of its divisors is an integer number (2001070711).

Almost surely, 2^4002141421 is an apocalyptic number.

It is an amenable number.

4002141421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002141421 is an equidigital number, since it uses as much as digits as its factorization.

4002141421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 4002141421 is about 63262.4803576338. The cubic root of 4002141421 is about 1587.6842759281.

Adding to 4002141421 its reverse (1241412004), we get a palindrome (5243553425).

The spelling of 4002141421 in words is "four billion, two million, one hundred forty-one thousand, four hundred twenty-one".