222111121221220 has 96 divisors (see below), whose sum is σ = 584571945517056. Its totient is φ = 68866982486400.

The previous prime is 222111121221211. The next prime is 222111121221259. The reversal of 222111121221220 is 22122121111222.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 222111121221191 and 222111121221200.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 377266072 + ... + 377854351.

It is an arithmetic number, because the mean of its divisors is an integer number (6089291099136).

Almost surely, 2^{222111121221220} is an apocalyptic number.

222111121221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222111121221220 is an abundant number, since it is smaller than the sum of its proper divisors (362460824295836).

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

222111121221220 is a wasteful number, since it uses less digits than its factorization.

222111121221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755120641 (or 755120639 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 222111121221220 its reverse (22122121111222), we get a palindrome (244233242332442).

The spelling of 222111121221220 in words is "two hundred twenty-two trillion, one hundred eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty".