3545201221 has 2 divisors, whose sum is σ = 3545201222. Its totient is φ = 3545201220.

The previous prime is 3545201183. The next prime is 3545201237. The reversal of 3545201221 is 1221025453.

3545201221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3544416225 + 784996 = 59535^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 3545201221 - 2¹¹ = 3545199173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3545201291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1772600610 + 1772600611.

It is an arithmetic number, because the mean of its divisors is an integer number (1772600611).

Almost surely, 2^3545201221 is an apocalyptic number.

It is an amenable number.

3545201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3545201221 is an equidigital number, since it uses as much as digits as its factorization.

3545201221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 3545201221 is about 59541.5923619784. The cubic root of 3545201221 is about 1524.8026219152.

Adding to 3545201221 its reverse (1221025453), we get a palindrome (4766226674).

The spelling of 3545201221 in words is "three billion, five hundred forty-five million, two hundred one thousand, two hundred twenty-one".