20121100120211 has 4 divisors (see below), whose sum is σ = 20404495896624. Its totient is φ = 19837704343800.

The previous prime is 20121100120201. The next prime is 20121100120217. The reversal of 20121100120211 is 11202100112102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121100120211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121100120217) 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, 141697888100 + ... + 141697888241.

It is an arithmetic number, because the mean of its divisors is an integer number (5101123974156).

Almost surely, 2^{20121100120211} is an apocalyptic number.

20121100120211 is a deficient number, since it is larger than the sum of its proper divisors (283395776413).

20121100120211 is an equidigital number, since it uses as much as digits as its factorization.

20121100120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283395776412.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20121100120211 its reverse (11202100112102), we get a palindrome (31323200232313).

The spelling of 20121100120211 in words is "twenty trillion, one hundred twenty-one billion, one hundred million, one hundred twenty thousand, two hundred eleven".