20001011220101 has 4 divisors (see below), whose sum is σ = 20004627391104. Its totient is φ = 19997395049100.

The previous prime is 20001011220053. The next prime is 20001011220133. The reversal of 20001011220101 is 10102211010002.

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-20001011220101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001011520101) 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, 1808077205 + ... + 1808088266.

It is an arithmetic number, because the mean of its divisors is an integer number (5001156847776).

Almost surely, 2^{20001011220101} is an apocalyptic number.

It is an amenable number.

20001011220101 is a deficient number, since it is larger than the sum of its proper divisors (3616171003).

20001011220101 is an equidigital number, since it uses as much as digits as its factorization.

20001011220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616171002.

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

Adding to 20001011220101 its reverse (10102211010002), we get a palindrome (30103222230103).

The spelling of 20001011220101 in words is "twenty trillion, one billion, eleven million, two hundred twenty thousand, one hundred one".