222012121220 has 48 divisors (see below), whose sum is σ = 470110314240. Its totient is φ = 88067587584.

The previous prime is 222012121217. The next prime is 222012121277. The reversal of 222012121220 is 22121210222.

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, 1229372 + ... + 1398348.

It is an arithmetic number, because the mean of its divisors is an integer number (9793964880).

Almost surely, 2^222012121220 is an apocalyptic number.

222012121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222012121220 is an abundant number, since it is smaller than the sum of its proper divisors (248098193020).

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

222012121220 is a wasteful number, since it uses less digits than its factorization.

222012121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169532 (or 169530 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222012121220 its reverse (22121210222), we get a palindrome (244133331442).

The spelling of 222012121220 in words is "two hundred twenty-two billion, twelve million, one hundred twenty-one thousand, two hundred twenty".