2111212021101 has 4 divisors (see below), whose sum is σ = 2814949361472. Its totient is φ = 1407474680732.

The previous prime is 2111212021067. The next prime is 2111212021141. The reversal of 2111212021101 is 1011202121112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2111212021101 - 2¹⁰ = 2111212020077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111212021141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351868670181 + ... + 351868670186.

It is an arithmetic number, because the mean of its divisors is an integer number (703737340368).

Almost surely, 2^{2111212021101} is an apocalyptic number.

It is an amenable number.

2111212021101 is a deficient number, since it is larger than the sum of its proper divisors (703737340371).

2111212021101 is an equidigital number, since it uses as much as digits as its factorization.

2111212021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703737340370.

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

Adding to 2111212021101 its reverse (1011202121112), we get a palindrome (3122414142213).

The spelling of 2111212021101 in words is "two trillion, one hundred eleven billion, two hundred twelve million, twenty-one thousand, one hundred one".