7712212221220 has 48 divisors (see below), whose sum is σ = 18359436392640. Its totient is φ = 2697713099136.

The previous prime is 7712212221209. The next prime is 7712212221283. The reversal of 7712212221220 is 221222122177.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780583342 + ... + 780593221.

It is an arithmetic number, because the mean of its divisors is an integer number (382488258180).

Almost surely, 2^{7712212221220} is an apocalyptic number.

It is an amenable number.

7712212221220 is an abundant number, since it is smaller than the sum of its proper divisors (10647224171420).

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

7712212221220 is a wasteful number, since it uses less digits than its factorization.

7712212221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561176604 (or 1561176602 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

Adding to 7712212221220 its reverse (221222122177), we get a palindrome (7933434343397).

The spelling of 7712212221220 in words is "seven trillion, seven hundred twelve billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty".