2111002120111 has 4 divisors (see below), whose sum is σ = 2122054487424. Its totient is φ = 2099949752800.

The previous prime is 2111002120081. The next prime is 2111002120133. The reversal of 2111002120111 is 1110212001112.

It is a happy number.

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 2111002120111 - 2¹⁹ = 2111001595823 is a prime.

It is a super-2 number, since 2×2111002120111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111002120091 and 2111002120100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111002129111) 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, 5526183370 + ... + 5526183751.

It is an arithmetic number, because the mean of its divisors is an integer number (530513621856).

Almost surely, 2^{2111002120111} is an apocalyptic number.

2111002120111 is a deficient number, since it is larger than the sum of its proper divisors (11052367313).

2111002120111 is a wasteful number, since it uses less digits than its factorization.

2111002120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11052367312.

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

Adding to 2111002120111 its reverse (1110212001112), we get a palindrome (3221214121223).

The spelling of 2111002120111 in words is "two trillion, one hundred eleven billion, two million, one hundred twenty thousand, one hundred eleven".