20020202110091 has 4 divisors (see below), whose sum is σ = 20024551495992. Its totient is φ = 20015852724192.

The previous prime is 20020202110079. The next prime is 20020202110121. The reversal of 20020202110091 is 19001120202002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20020202110091 - 2¹⁴ = 20020202093707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020202130091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2174686046 + ... + 2174695251.

It is an arithmetic number, because the mean of its divisors is an integer number (5006137873998).

Almost surely, 2^{20020202110091} is an apocalyptic number.

20020202110091 is a deficient number, since it is larger than the sum of its proper divisors (4349385901).

20020202110091 is an equidigital number, since it uses as much as digits as its factorization.

20020202110091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4349385900.

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

Adding to 20020202110091 its reverse (19001120202002), we get a palindrome (39021322312093).

The spelling of 20020202110091 in words is "twenty trillion, twenty billion, two hundred two million, one hundred ten thousand, ninety-one".