20102001221211 has 32 divisors (see below), whose sum is σ = 33879464306688. Its totient is φ = 10316678970240.

The previous prime is 20102001221123. The next prime is 20102001221243. The reversal of 20102001221211 is 11212210020102.

It is a de Polignac number, because none of the positive numbers 2^k-20102001221211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20102001221611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 995039955 + ... + 995060156.

It is an arithmetic number, because the mean of its divisors is an integer number (1058733259584).

Almost surely, 2^{20102001221211} is an apocalyptic number.

20102001221211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20102001221211 is a deficient number, since it is larger than the sum of its proper divisors (13777463085477).

20102001221211 is a wasteful number, since it uses less digits than its factorization.

20102001221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990100171.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20102001221211 its reverse (11212210020102), we get a palindrome (31314211241313).

The spelling of 20102001221211 in words is "twenty trillion, one hundred two billion, one million, two hundred twenty-one thousand, two hundred eleven".