1122212221020 has 72 divisors (see below), whose sum is σ = 3713502265200. Its totient is φ = 272051447040.

The previous prime is 1122212221003. The next prime is 1122212221051. The reversal of 1122212221020 is 201222122211.

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 = 1122212220984 and 1122212221002.

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, 283384945 + ... + 283388904.

It is an arithmetic number, because the mean of its divisors is an integer number (51576420350).

Almost surely, 2^{1122212221020} is an apocalyptic number.

1122212221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122212221020 is an abundant number, since it is smaller than the sum of its proper divisors (2591290044180).

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

1122212221020 is a wasteful number, since it uses less digits than its factorization.

1122212221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566773875 (or 566773870 counting only the distinct ones).

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

Adding to 1122212221020 its reverse (201222122211), we get a palindrome (1323434343231).

The spelling of 1122212221020 in words is "one trillion, one hundred twenty-two billion, two hundred twelve million, two hundred twenty-one thousand, twenty".