20012211100001 has 4 divisors (see below), whose sum is σ = 20134985401392. Its totient is φ = 19889436798612.

The previous prime is 20012211099989. The next prime is 20012211100003. The reversal of 20012211100001 is 10000111221002.

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 a de Polignac number, because none of the positive numbers 2^k-20012211100001 is a prime.

It is a super-2 number, since 2×20012211100001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012211100003) 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, 61387150451 + ... + 61387150776.

It is an arithmetic number, because the mean of its divisors is an integer number (5033746350348).

Almost surely, 2^{20012211100001} is an apocalyptic number.

It is an amenable number.

20012211100001 is a deficient number, since it is larger than the sum of its proper divisors (122774301391).

20012211100001 is a wasteful number, since it uses less digits than its factorization.

20012211100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122774301390.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20012211100001 its reverse (10000111221002), we get a palindrome (30012322321003).

The spelling of 20012211100001 in words is "twenty trillion, twelve billion, two hundred eleven million, one hundred thousand, one".