3512980021 has 4 divisors (see below), whose sum is σ = 3522398572. Its totient is φ = 3503561472.

The previous prime is 3512980019. The next prime is 3512980027. The reversal of 3512980021 is 1200892153.

3512980021 = 41910² + 41911².

3512980021 is digitally balanced in base 2, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 1756448100 + 1756531921 = 41910^2 + 41911^2 .

It is a cyclic number.

It is not a de Polignac number, because 3512980021 - 2¹ = 3512980019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3512980027) 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, 4708716 + ... + 4709461.

It is an arithmetic number, because the mean of its divisors is an integer number (880599643).

Almost surely, 2^3512980021 is an apocalyptic number.

3512980021 is the 41911-st centered square number.

It is an amenable number.

3512980021 is a deficient number, since it is larger than the sum of its proper divisors (9418551).

3512980021 is an equidigital number, since it uses as much as digits as its factorization.

3512980021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9418550.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 3512980021 is about 59270.3975100556. The cubic root of 3512980021 is about 1520.1690747117.

The spelling of 3512980021 in words is "three billion, five hundred twelve million, nine hundred eighty thousand, twenty-one".