2102021209973 has 16 divisors (see below), whose sum is σ = 2233453906944. Its totient is φ = 1971457032960.

The previous prime is 2102021209969. The next prime is 2102021209987. The reversal of 2102021209973 is 3799021202012.

It is a cyclic number.

It is not a de Polignac number, because 2102021209973 - 2² = 2102021209969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102021209903) 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, 19386236 + ... + 19494362.

It is an arithmetic number, because the mean of its divisors is an integer number (139590869184).

Almost surely, 2^{2102021209973} is an apocalyptic number.

It is an amenable number.

2102021209973 is a deficient number, since it is larger than the sum of its proper divisors (131432696971).

2102021209973 is a wasteful number, since it uses less digits than its factorization.

2102021209973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112132.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 2102021209973 in words is "two trillion, one hundred two billion, twenty-one million, two hundred nine thousand, nine hundred seventy-three".