72070221220 has 48 divisors (see below), whose sum is σ = 151691037120. Its totient is φ = 28762729344.

The previous prime is 72070221211. The next prime is 72070221221. The reversal of 72070221220 is 2212207027.

It is not an unprimeable number, because it can be changed into a prime (72070221221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28184182 + ... + 28186738.

It is an arithmetic number, because the mean of its divisors is an integer number (3160229940).

Almost surely, 2^72070221220 is an apocalyptic number.

It is an amenable number.

72070221220 is an abundant number, since it is smaller than the sum of its proper divisors (79620815900).

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

72070221220 is a wasteful number, since it uses less digits than its factorization.

72070221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5212 (or 5210 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

Adding to 72070221220 its reverse (2212207027), we get a palindrome (74282428247).

The spelling of 72070221220 in words is "seventy-two billion, seventy million, two hundred twenty-one thousand, two hundred twenty".