1102020000021 has 48 divisors (see below), whose sum is σ = 1660438241280. Its totient is φ = 703818249120.

The previous prime is 1102020000013. The next prime is 1102020000047. The reversal of 1102020000021 is 1200000202011.

It is not a de Polignac number, because 1102020000021 - 2³ = 1102020000013 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1102019999958 and 1102020000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102020000001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4042596 + ... + 4306578.

It is an arithmetic number, because the mean of its divisors is an integer number (34592463360).

Almost surely, 2^{1102020000021} is an apocalyptic number.

It is an amenable number.

1102020000021 is a deficient number, since it is larger than the sum of its proper divisors (558418241259).

1102020000021 is a wasteful number, since it uses less digits than its factorization.

1102020000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264246 (or 264243 counting only the distinct ones).

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

Adding to 1102020000021 its reverse (1200000202011), we get a palindrome (2302020202032).

The spelling of 1102020000021 in words is "one trillion, one hundred two billion, twenty million, twenty-one", and thus it is an aban number.