1122221212020 has 36 divisors (see below), whose sum is σ = 3404071010340. Its totient is φ = 299258989824.

The previous prime is 1122221211997. The next prime is 1122221212033. The reversal of 1122221212020 is 202121222211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 565663435236 + 556557776784 = 752106^2 + 746028^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 1122221211984 and 1122221212002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3117280965 + ... + 3117281324.

It is an arithmetic number, because the mean of its divisors is an integer number (94557528065).

Almost surely, 2^{1122221212020} is an apocalyptic number.

1122221212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122221212020 is an abundant number, since it is smaller than the sum of its proper divisors (2281849798320).

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

1122221212020 is a wasteful number, since it uses less digits than its factorization.

1122221212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6234562304 (or 6234562299 counting only the distinct ones).

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

Adding to 1122221212020 its reverse (202121222211), we get a palindrome (1324342434231).

The spelling of 1122221212020 in words is "one trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, twenty".