2223121220 has 24 divisors (see below), whose sum is σ = 4914268800. Its totient is φ = 842445792.

The previous prime is 2223121213. The next prime is 2223121249. The reversal of 2223121220 is 221213222.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2924780 + ... + 2925539.

It is an arithmetic number, because the mean of its divisors is an integer number (204761200).

Almost surely, 2^2223121220 is an apocalyptic number.

2223121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2223121220 is an abundant number, since it is smaller than the sum of its proper divisors (2691147580).

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

2223121220 is a wasteful number, since it uses less digits than its factorization.

2223121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5850347 (or 5850345 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2223121220 is about 47149.9864262971. The cubic root of 2223121220 is about 1305.1318295306.

Adding to 2223121220 its reverse (221213222), we get a palindrome (2444334442).

The spelling of 2223121220 in words is "two billion, two hundred twenty-three million, one hundred twenty-one thousand, two hundred twenty".