1123202031220 has 48 divisors (see below), whose sum is σ = 2489122056960. Its totient is φ = 424562269824.

The previous prime is 1123202031187. The next prime is 1123202031227. The reversal of 1123202031220 is 221302023211.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123202031227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3571804 + ... + 3873523.

It is an arithmetic number, because the mean of its divisors is an integer number (51856709520).

Almost surely, 2^{1123202031220} is an apocalyptic number.

1123202031220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123202031220 is an abundant number, since it is smaller than the sum of its proper divisors (1365920025740).

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

1123202031220 is a wasteful number, since it uses less digits than its factorization.

1123202031220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7445752 (or 7445750 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1123202031220 its reverse (221302023211), we get a palindrome (1344504054431).

The spelling of 1123202031220 in words is "one trillion, one hundred twenty-three billion, two hundred two million, thirty-one thousand, two hundred twenty".