2101001221111 has 8 divisors (see below), whose sum is σ = 2265100375104. Its totient is φ = 1937256877920.

The previous prime is 2101001221051. The next prime is 2101001221133. The reversal of 2101001221111 is 1111221001012.

It is a happy number.

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

It is not a de Polignac number, because 2101001221111 - 2¹⁷ = 2101001090039 is a prime.

It is a super-2 number, since 2×2101001221111² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101001221091 and 2101001221100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101001221181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88690396 + ... + 88714081.

It is an arithmetic number, because the mean of its divisors is an integer number (283137546888).

Almost surely, 2^{2101001221111} is an apocalyptic number.

2101001221111 is a deficient number, since it is larger than the sum of its proper divisors (164099153993).

2101001221111 is a wasteful number, since it uses less digits than its factorization.

2101001221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177405401.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2101001221111 its reverse (1111221001012), we get a palindrome (3212222222123).

The spelling of 2101001221111 in words is "two trillion, one hundred one billion, one million, two hundred twenty-one thousand, one hundred eleven".