3621221142 has 64 divisors (see below), whose sum is σ = 9131097600. Its totient is φ = 929998080.

The previous prime is 3621221113. The next prime is 3621221243. The reversal of 3621221142 is 2411221263.

It is a super-2 number, since 2×3621221142² = 26226485118535568328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2917 + ... + 85152.

It is an arithmetic number, because the mean of its divisors is an integer number (142673400).

Almost surely, 2^3621221142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3621221142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4565548800).

3621221142 is an abundant number, since it is smaller than the sum of its proper divisors (5509876458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3621221142 is a wasteful number, since it uses less digits than its factorization.

3621221142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88181.

The product of its digits is 1152, while the sum is 24.

The square root of 3621221142 is about 60176.5830036901. The cubic root of 3621221142 is about 1535.6244410932.

The spelling of 3621221142 in words is "three billion, six hundred twenty-one million, two hundred twenty-one thousand, one hundred forty-two".