2101111121211 has 4 divisors (see below), whose sum is σ = 2801481494952. Its totient is φ = 1400740747472.

The previous prime is 2101111121167. The next prime is 2101111121267. The reversal of 2101111121211 is 1121211111012.

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

It is a cyclic number.

It is not a de Polignac number, because 2101111121211 - 2¹³ = 2101111113019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101111122211) 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, 350185186866 + ... + 350185186871.

It is an arithmetic number, because the mean of its divisors is an integer number (700370373738).

Almost surely, 2^{2101111121211} is an apocalyptic number.

2101111121211 is a deficient number, since it is larger than the sum of its proper divisors (700370373741).

2101111121211 is an equidigital number, since it uses as much as digits as its factorization.

2101111121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700370373740.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 2101111121211 its reverse (1121211111012), we get a palindrome (3222322232223).

The spelling of 2101111121211 in words is "two trillion, one hundred one billion, one hundred eleven million, one hundred twenty-one thousand, two hundred eleven".