2100221211111 has 32 divisors (see below), whose sum is σ = 2995915704768. Its totient is φ = 1304056627200.

The previous prime is 2100221211107. The next prime is 2100221211113. The reversal of 2100221211111 is 1111121220012.

It is a happy number.

It is not a de Polignac number, because 2100221211111 - 2² = 2100221211107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100221211113) 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, 60835791 + ... + 60870303.

It is an arithmetic number, because the mean of its divisors is an integer number (93622365774).

Almost surely, 2^{2100221211111} is an apocalyptic number.

2100221211111 is a deficient number, since it is larger than the sum of its proper divisors (895694493657).

2100221211111 is a wasteful number, since it uses less digits than its factorization.

2100221211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46931.

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

Adding to 2100221211111 its reverse (1111121220012), we get a palindrome (3211342431123).

The spelling of 2100221211111 in words is "two trillion, one hundred billion, two hundred twenty-one million, two hundred eleven thousand, one hundred eleven".