222111222121020 has 24 divisors (see below), whose sum is σ = 621911421939024. Its totient is φ = 59229659232256.

The previous prime is 222111222120967. The next prime is 222111222121111. The reversal of 222111222121020 is 20121222111222.

It is a congruent number.

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, 1850926850949 + ... + 1850926851068.

It is an arithmetic number, because the mean of its divisors is an integer number (25912975914126).

Almost surely, 2^{222111222121020} is an apocalyptic number.

222111222121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222111222121020 is an abundant number, since it is smaller than the sum of its proper divisors (399800199818004).

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

222111222121020 is a wasteful number, since it uses less digits than its factorization.

222111222121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701853702029 (or 3701853702027 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222111222121020 its reverse (20121222111222), we get a palindrome (242232444232242).

The spelling of 222111222121020 in words is "two hundred twenty-two trillion, one hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, twenty".