2101020120209 has 16 divisors (see below), whose sum is σ = 2143116144000. Its totient is φ = 2059277955840.

The previous prime is 2101020120193. The next prime is 2101020120271. The reversal of 2101020120209 is 9020210201012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2101020120209 - 2⁴ = 2101020120193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101020120509) 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, 49404047 + ... + 49446555.

It is an arithmetic number, because the mean of its divisors is an integer number (133944759000).

Almost surely, 2^{2101020120209} is an apocalyptic number.

It is an amenable number.

2101020120209 is a deficient number, since it is larger than the sum of its proper divisors (42096023791).

2101020120209 is a wasteful number, since it uses less digits than its factorization.

2101020120209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46648.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 2101020120209 in words is "two trillion, one hundred one billion, twenty million, one hundred twenty thousand, two hundred nine".