20102021012091 has 8 divisors (see below), whose sum is σ = 26802728863504. Its totient is φ = 13401330251040.

The previous prime is 20102021012069. The next prime is 20102021012093. The reversal of 20102021012091 is 19021012020102.

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

It is not a de Polignac number, because 20102021012091 - 2⁶ = 20102021012027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102021012093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1215616 + ... + 6456141.

It is an arithmetic number, because the mean of its divisors is an integer number (3350341107938).

Almost surely, 2^{20102021012091} is an apocalyptic number.

20102021012091 is a deficient number, since it is larger than the sum of its proper divisors (6700707851413).

20102021012091 is an equidigital number, since it uses as much as digits as its factorization.

20102021012091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8545181.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 20102021012091 its reverse (19021012020102), we get a palindrome (39123033032193).

The spelling of 20102021012091 in words is "twenty trillion, one hundred two billion, twenty-one million, twelve thousand, ninety-one".