1123421213020 has 24 divisors (see below), whose sum is σ = 2359497463344. Its totient is φ = 449308882176.

The previous prime is 1123421212987. The next prime is 1123421213023. The reversal of 1123421213020 is 203121243211.

It is a junction number, because it is equal to n+sod(n) for n = 1123421212982 and 1123421213000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123421213023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3570477 + ... + 3872356.

It is an arithmetic number, because the mean of its divisors is an integer number (98312394306).

Almost surely, 2^{1123421213020} is an apocalyptic number.

1123421213020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123421213020 is an abundant number, since it is smaller than the sum of its proper divisors (1236076250324).

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

1123421213020 is a wasteful number, since it uses less digits than its factorization.

1123421213020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7450389 (or 7450387 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1123421213020 its reverse (203121243211), we get a palindrome (1326542456231).

The spelling of 1123421213020 in words is "one trillion, one hundred twenty-three billion, four hundred twenty-one million, two hundred thirteen thousand, twenty".