2121111111201 has 8 divisors (see below), whose sum is σ = 2919378733824. Its totient is φ = 1368458781360.

The previous prime is 2121111111181. The next prime is 2121111111209. The reversal of 2121111111201 is 1021111111212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2121111111201 - 2¹⁷ = 2121110980129 is a prime.

It is a super-2 number, since 2×2121111111201² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121111111209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11403823086 + ... + 11403823271.

It is an arithmetic number, because the mean of its divisors is an integer number (364922341728).

Almost surely, 2^{2121111111201} is an apocalyptic number.

It is an amenable number.

2121111111201 is a deficient number, since it is larger than the sum of its proper divisors (798267622623).

2121111111201 is a wasteful number, since it uses less digits than its factorization.

2121111111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22807646391.

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

Adding to 2121111111201 its reverse (1021111111212), we get a palindrome (3142222222413).

The spelling of 2121111111201 in words is "two trillion, one hundred twenty-one billion, one hundred eleven million, one hundred eleven thousand, two hundred one".