20010211121101 has 4 divisors (see below), whose sum is σ = 20010294851104. Its totient is φ = 20010127391100.

The previous prime is 20010211121099. The next prime is 20010211121161. The reversal of 20010211121101 is 10112111201002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20010211121101 - 2¹ = 20010211121099 is a prime.

It is a super-2 number, since 2×20010211121101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010211121161) 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, 41505495 + ... + 41984836.

It is an arithmetic number, because the mean of its divisors is an integer number (5002573712776).

Almost surely, 2^{20010211121101} is an apocalyptic number.

It is an amenable number.

20010211121101 is a deficient number, since it is larger than the sum of its proper divisors (83730003).

20010211121101 is an equidigital number, since it uses as much as digits as its factorization.

20010211121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83730002.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20010211121101 its reverse (10112111201002), we get a palindrome (30122322322103).

The spelling of 20010211121101 in words is "twenty trillion, ten billion, two hundred eleven million, one hundred twenty-one thousand, one hundred one".