1222111222020 has 72 divisors (see below), whose sum is σ = 3992229999576. Its totient is φ = 300827377152.

The previous prime is 1222111221973. The next prime is 1222111222039. The reversal of 1222111222020 is 202221112221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26329605696 + 1195781616324 = 162264^2 + 1093518^2 .

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 = 1222111221984 and 1222111222002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 261132537 + ... + 261137216.

It is an arithmetic number, because the mean of its divisors is an integer number (55447638883).

Almost surely, 2^{1222111222020} is an apocalyptic number.

1222111222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222111222020 is an abundant number, since it is smaller than the sum of its proper divisors (2770118777556).

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

1222111222020 is a wasteful number, since it uses less digits than its factorization.

1222111222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522269781 (or 522269776 counting only the distinct ones).

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

Adding to 1222111222020 its reverse (202221112221), we get a palindrome (1424332334241).

The spelling of 1222111222020 in words is "one trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twenty-two thousand, twenty".