2211221222220 has 48 divisors (see below), whose sum is σ = 6460611575040. Its totient is φ = 564021644736.

The previous prime is 2211221222131. The next prime is 2211221222239. The reversal of 2211221222220 is 222221221122.

It is a super-2 number, since 2×2211221222220² (a number of 25 digits) contains 22 as substring.

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, 801165730 + ... + 801168489.

It is an arithmetic number, because the mean of its divisors is an integer number (134596074480).

Almost surely, 2^{2211221222220} is an apocalyptic number.

2211221222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211221222220 is an abundant number, since it is smaller than the sum of its proper divisors (4249390352820).

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

2211221222220 is a wasteful number, since it uses less digits than its factorization.

2211221222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602334254 (or 1602334252 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 2211221222220 its reverse (222221221122), we get a palindrome (2433442443342).

The spelling of 2211221222220 in words is "two trillion, two hundred eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty".