222120211021020 has 240 divisors, whose sum is σ = 752626005139008. Its totient is φ = 54513499944960.

The previous prime is 222120211021013. The next prime is 222120211021073. The reversal of 222120211021020 is 20120112021222.

It is a happy number.

222120211021020 is a `hidden beast` number, since 2 + 221 + 2 + 0 + 211 + 0 + 210 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 222120211020984 and 222120211021002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 8551176 + ... + 22745615.

Almost surely, 2^{222120211021020} is an apocalyptic number.

222120211021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222120211021020 is an abundant number, since it is smaller than the sum of its proper divisors (530505794117988).

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

222120211021020 is a wasteful number, since it uses less digits than its factorization.

222120211021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31297162 (or 31297151 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222120211021020 its reverse (20120112021222), we get a palindrome (242240323042242).

The spelling of 222120211021020 in words is "two hundred twenty-two trillion, one hundred twenty billion, two hundred eleven million, twenty-one thousand, twenty".