2100012221111 has 32 divisors (see below), whose sum is σ = 2464319477760. Its totient is φ = 1751991897600.

The previous prime is 2100012220987. The next prime is 2100012221123. The reversal of 2100012221111 is 1111222100012.

It is a de Polignac number, because none of the positive numbers 2^k-2100012221111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100012221711) 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, 291381470 + ... + 291388676.

It is an arithmetic number, because the mean of its divisors is an integer number (77009983680).

Almost surely, 2^{2100012221111} is an apocalyptic number.

2100012221111 is a deficient number, since it is larger than the sum of its proper divisors (364307256649).

2100012221111 is a wasteful number, since it uses less digits than its factorization.

2100012221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9495.

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

Adding to 2100012221111 its reverse (1111222100012), we get a palindrome (3211234321123).

The spelling of 2100012221111 in words is "two trillion, one hundred billion, twelve million, two hundred twenty-one thousand, one hundred eleven".