3540200021 has 2 divisors, whose sum is σ = 3540200022. Its totient is φ = 3540200020.

The previous prime is 3540200017. The next prime is 3540200039. The reversal of 3540200021 is 1200020453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3520048900 + 20151121 = 59330^2 + 4489^2 .

It is a cyclic number.

It is not a de Polignac number, because 3540200021 - 2² = 3540200017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3540200011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1770100010 + 1770100011.

It is an arithmetic number, because the mean of its divisors is an integer number (1770100011).

Almost surely, 2^3540200021 is an apocalyptic number.

It is an amenable number.

3540200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3540200021 is an equidigital number, since it uses as much as digits as its factorization.

3540200021 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 17.

The square root of 3540200021 is about 59499.5800069211. The cubic root of 3540200021 is about 1524.0852736722.

Adding to 3540200021 its reverse (1200020453), we get a palindrome (4740220474).

The spelling of 3540200021 in words is "three billion, five hundred forty million, two hundred thousand, twenty-one".