20021102200091 has 8 divisors (see below), whose sum is σ = 21254163485184. Its totient is φ = 18794190847360.

The previous prime is 20021102200081. The next prime is 20021102200147. The reversal of 20021102200091 is 19000220112002.

It is a happy number.

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

It is not a de Polignac number, because 20021102200091 - 2²² = 20021098005787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021102200081) 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, 1537476380 + ... + 1537489401.

It is an arithmetic number, because the mean of its divisors is an integer number (2656770435648).

Almost surely, 2^{20021102200091} is an apocalyptic number.

20021102200091 is a deficient number, since it is larger than the sum of its proper divisors (1233061285093).

20021102200091 is a wasteful number, since it uses less digits than its factorization.

20021102200091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074966181.

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

Adding to 20021102200091 its reverse (19000220112002), we get a palindrome (39021322312093).

The spelling of 20021102200091 in words is "twenty trillion, twenty-one billion, one hundred two million, two hundred thousand, ninety-one".