2101220111211 has 16 divisors (see below), whose sum is σ = 3175933232640. Its totient is φ = 1225002817440.

The previous prime is 2101220111209. The next prime is 2101220111257. The reversal of 2101220111211 is 1121110221012.

It is a happy number.

It is not a de Polignac number, because 2101220111211 - 2¹ = 2101220111209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101220111261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1417826595 + ... + 1417828076.

It is an arithmetic number, because the mean of its divisors is an integer number (198495827040).

Almost surely, 2^{2101220111211} is an apocalyptic number.

2101220111211 is a deficient number, since it is larger than the sum of its proper divisors (1074713121429).

2101220111211 is a wasteful number, since it uses less digits than its factorization.

2101220111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2835654706.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2101220111211 its reverse (1121110221012), we get a palindrome (3222330332223).

The spelling of 2101220111211 in words is "two trillion, one hundred one billion, two hundred twenty million, one hundred eleven thousand, two hundred eleven".