1123021301220 has 288 divisors, whose sum is σ = 4305929042688. Its totient is φ = 230541106176.

The previous prime is 1123021301173. The next prime is 1123021301249. The reversal of 1123021301220 is 221031203211.

1123021301220 is a `hidden beast` number, since 1 + 1 + 230 + 213 + 0 + 1 + 220 = 666.

It is a super-2 number, since 2×1123021301220² (a number of 25 digits) contains 22 as substring.

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 = 1123021301193 and 1123021301202.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 320434 + ... + 1532553.

Almost surely, 2^{1123021301220} is an apocalyptic number.

1123021301220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123021301220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2152964521344).

1123021301220 is an abundant number, since it is smaller than the sum of its proper divisors (3182907741468).

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

1123021301220 is a wasteful number, since it uses less digits than its factorization.

1123021301220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853059 (or 1853054 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1123021301220 its reverse (221031203211), we get a palindrome (1344052504431).

It can be divided in two parts, 1123021 and 301220, that added together give a palindrome (1424241).

The spelling of 1123021301220 in words is "one trillion, one hundred twenty-three billion, twenty-one million, three hundred one thousand, two hundred twenty".