3545212121 has 4 divisors (see below), whose sum is σ = 3867504144. Its totient is φ = 3222920100.

The previous prime is 3545212093. The next prime is 3545212127. The reversal of 3545212121 is 1212125453.

3545212121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3545212121 - 2⁶ = 3545212057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3545212127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161145995 + ... + 161146016.

It is an arithmetic number, because the mean of its divisors is an integer number (966876036).

Almost surely, 2^3545212121 is an apocalyptic number.

It is an amenable number.

3545212121 is a deficient number, since it is larger than the sum of its proper divisors (322292023).

3545212121 is a wasteful number, since it uses less digits than its factorization.

3545212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322292022.

The product of its digits is 2400, while the sum is 26.

The square root of 3545212121 is about 59541.6838945625. The cubic root of 3545212121 is about 1524.8041846221.

Adding to 3545212121 its reverse (1212125453), we get a palindrome (4757337574).

The spelling of 3545212121 in words is "three billion, five hundred forty-five million, two hundred twelve thousand, one hundred twenty-one".