3621012121 has 8 divisors (see below), whose sum is σ = 3837105000. Its totient is φ = 3405262848.

The previous prime is 3621012113. The next prime is 3621012137. The reversal of 3621012121 is 1212101263.

3621012121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 769452121 + 2851560000 = 27739^2 + 53400^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3621012121 - 2³ = 3621012113 is a prime.

It is a super-2 number, since 2×3621012121² = 26223457560857837282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3621012151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64036 + ... + 106501.

It is an arithmetic number, because the mean of its divisors is an integer number (479638125).

Almost surely, 2^3621012121 is an apocalyptic number.

It is an amenable number.

3621012121 is a deficient number, since it is larger than the sum of its proper divisors (216092879).

3621012121 is a wasteful number, since it uses less digits than its factorization.

3621012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171803.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 3621012121 is about 60174.8462482456. The cubic root of 3621012121 is about 1535.5948945286.

Adding to 3621012121 its reverse (1212101263), we get a palindrome (4833113384).

The spelling of 3621012121 in words is "three billion, six hundred twenty-one million, twelve thousand, one hundred twenty-one".