1122020220 has 48 divisors (see below), whose sum is σ = 3184705440. Its totient is φ = 295105536.

The previous prime is 1122020203. The next prime is 1122020239. The reversal of 1122020220 is 220202211.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1122020196 and 1122020205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123705 + ... + 132464.

It is an arithmetic number, because the mean of its divisors is an integer number (66348030).

Almost surely, 2^1122020220 is an apocalyptic number.

1122020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122020220 is an abundant number, since it is smaller than the sum of its proper divisors (2062685220).

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

1122020220 is a wasteful number, since it uses less digits than its factorization.

1122020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256254 (or 256252 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1122020220 is about 33496.5702721935. The cubic root of 1122020220 is about 1039.1228489169.

Adding to 1122020220 its reverse (220202211), we get a palindrome (1342222431).

It can be divided in two parts, 1 and 122020220, that added together give a palindrome (122020221).

The spelling of 1122020220 in words is "one billion, one hundred twenty-two million, twenty thousand, two hundred twenty".