1220043000020 has 24 divisors (see below), whose sum is σ = 2759174169864. Its totient is φ = 450477415296.

The previous prime is 1220043000013. The next prime is 1220043000089. The reversal of 1220043000020 is 200003400221.

It can be written as a sum of positive squares in 4 ways, for example, as 1853991364 + 1218189008656 = 43058^2 + 1103716^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220042999959 and 1220043000004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2346236279 + ... + 2346236798.

It is an arithmetic number, because the mean of its divisors is an integer number (114965590411).

Almost surely, 2^{1220043000020} is an apocalyptic number.

1220043000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220043000020 is an abundant number, since it is smaller than the sum of its proper divisors (1539131169844).

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

1220043000020 is a wasteful number, since it uses less digits than its factorization.

1220043000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692473099 (or 4692473097 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 1220043000020 its reverse (200003400221), we get a palindrome (1420046400241).

The spelling of 1220043000020 in words is "one trillion, two hundred twenty billion, forty-three million, twenty", and thus it is an aban number.