20011211120101 has 4 divisors (see below), whose sum is σ = 20011232174400. Its totient is φ = 20011190065804.

The previous prime is 20011211120083. The next prime is 20011211120111. The reversal of 20011211120101 is 10102111211002.

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 20011211120101 - 2⁹ = 20011211119589 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 (20011211120111) 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, 9030541 + ... + 11026018.

It is an arithmetic number, because the mean of its divisors is an integer number (5002808043600).

Almost surely, 2^{20011211120101} is an apocalyptic number.

It is an amenable number.

20011211120101 is a deficient number, since it is larger than the sum of its proper divisors (21054299).

20011211120101 is an equidigital number, since it uses as much as digits as its factorization.

20011211120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21054298.

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

Adding to 20011211120101 its reverse (10102111211002), we get a palindrome (30113322331103).

Subtracting from 20011211120101 its reverse (10102111211002), we obtain a palindrome (9909099909099).

The spelling of 20011211120101 in words is "twenty trillion, eleven billion, two hundred eleven million, one hundred twenty thousand, one hundred one".