1222221112020 has 72 divisors (see below), whose sum is σ = 3710116859904. Its totient is φ = 325687140288.

The previous prime is 1222221112019. The next prime is 1222221112103. The reversal of 1222221112020 is 202111222221.

It is a happy number.

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 = 1222221111984 and 1222221112002.

It is a congruent number.

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, 2237524 + ... + 2729643.

It is an arithmetic number, because the mean of its divisors is an integer number (51529400832).

Almost surely, 2^{1222221112020} is an apocalyptic number.

1222221112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222221112020 is an abundant number, since it is smaller than the sum of its proper divisors (2487895747884).

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

1222221112020 is a wasteful number, since it uses less digits than its factorization.

1222221112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4968549 (or 4968544 counting only the distinct ones).

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

Adding to 1222221112020 its reverse (202111222221), we get a palindrome (1424332334241).

The spelling of 1222221112020 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred twelve thousand, twenty".