1120000020021 has 20 divisors (see below), whose sum is σ = 1683350803552. Its totient is φ = 742085894088.

The previous prime is 1120000020017. The next prime is 1120000020071. The reversal of 1120000020021 is 1200200000211.

It is not a de Polignac number, because 1120000020021 - 2² = 1120000020017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1120000019985 and 1120000020012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120000020071) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42401401 + ... + 42427806.

Almost surely, 2^{1120000020021} is an apocalyptic number.

It is an amenable number.

1120000020021 is a deficient number, since it is larger than the sum of its proper divisors (563350783531).

1120000020021 is an equidigital number, since it uses as much as digits as its factorization.

1120000020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84829382 (or 84829373 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1120000020021 its reverse (1200200000211), we get a palindrome (2320200020232).

The spelling of 1120000020021 in words is "one trillion, one hundred twenty billion, twenty thousand, twenty-one".