3722121216 has 312 divisors, whose sum is σ = 11990837664. Its totient is φ = 1102970880.

The previous prime is 3722121199. The next prime is 3722121233. The reversal of 3722121216 is 6121212273.

It is an interprime number because it is at equal distance from previous prime (3722121199) and next prime (3722121233).

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 3722121216.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27168700 + ... + 27168836.

It is an arithmetic number, because the mean of its divisors is an integer number (38432172).

Almost surely, 2^3722121216 is an apocalyptic number.

3722121216 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3722121216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5995418832).

3722121216 is an abundant number, since it is smaller than the sum of its proper divisors (8268716448).

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

3722121216 is a wasteful number, since it uses less digits than its factorization.

3722121216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 220 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 3722121216 is about 61009.1896028787. The cubic root of 3722121216 is about 1549.7566341463.

Adding to 3722121216 its reverse (6121212273), we get a palindrome (9843333489).

The spelling of 3722121216 in words is "three billion, seven hundred twenty-two million, one hundred twenty-one thousand, two hundred sixteen".