2220221212321 has 16 divisors (see below), whose sum is σ = 2628594489600. Its totient is φ = 1834832760768.

The previous prime is 2220221212309. The next prime is 2220221212331. The reversal of 2220221212321 is 1232121220222.

It is a happy number.

It is not a de Polignac number, because 2220221212321 - 2²³ = 2220212823713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220221212292 and 2220221212301.

It is not an unprimeable number, because it can be changed into a prime (2220221212331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7569085 + ... + 7856938.

It is an arithmetic number, because the mean of its divisors is an integer number (164287155600).

Almost surely, 2^{2220221212321} is an apocalyptic number.

It is an amenable number.

2220221212321 is a deficient number, since it is larger than the sum of its proper divisors (408373277279).

2220221212321 is a wasteful number, since it uses less digits than its factorization.

2220221212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15426768.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 2220221212321 its reverse (1232121220222), we get a palindrome (3452342432543).

The spelling of 2220221212321 in words is "two trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twelve thousand, three hundred twenty-one".