2101020021091 has 8 divisors (see below), whose sum is σ = 2117872553984. Its totient is φ = 2084172317640.

The previous prime is 2101020021083. The next prime is 2101020021151. The reversal of 2101020021091 is 1901200201012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2101020021091 - 2³ = 2101020021083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101060021091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331245 + ... + 2076478.

It is an arithmetic number, because the mean of its divisors is an integer number (264734069248).

Almost surely, 2^{2101020021091} is an apocalyptic number.

2101020021091 is a deficient number, since it is larger than the sum of its proper divisors (16852532893).

2101020021091 is a wasteful number, since it uses less digits than its factorization.

2101020021091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414721.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 2101020021091 in words is "two trillion, one hundred one billion, twenty million, twenty-one thousand, ninety-one".