20101101210091 has 8 divisors (see below), whose sum is σ = 22007638216944. Its totient is φ = 18207758231520.

The previous prime is 20101101210067. The next prime is 20101101210101. The reversal of 20101101210091 is 19001210110102.

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

It is not a de Polignac number, because 20101101210091 - 2¹⁵ = 20101101177323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101101210011) 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, 3298503880 + ... + 3298509973.

It is an arithmetic number, because the mean of its divisors is an integer number (2750954777118).

Almost surely, 2^{20101101210091} is an apocalyptic number.

20101101210091 is a deficient number, since it is larger than the sum of its proper divisors (1906537006853).

20101101210091 is a wasteful number, since it uses less digits than its factorization.

20101101210091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6597014141.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 20101101210091 its reverse (19001210110102), we get a palindrome (39102311320193).

The spelling of 20101101210091 in words is "twenty trillion, one hundred one billion, one hundred one million, two hundred ten thousand, ninety-one".