2102120021111 has 32 divisors (see below), whose sum is σ = 2427540627456. Its totient is φ = 1801508940000.

The previous prime is 2102120021101. The next prime is 2102120021161. The reversal of 2102120021111 is 1111200212012.

It is not a de Polignac number, because 2102120021111 - 2³⁰ = 2101046279287 is a prime.

It is a super-2 number, since 2×2102120021111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102120021101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51191990 + ... + 51233036.

It is an arithmetic number, because the mean of its divisors is an integer number (75860644608).

Almost surely, 2^{2102120021111} is an apocalyptic number.

2102120021111 is a deficient number, since it is larger than the sum of its proper divisors (325420606345).

2102120021111 is a wasteful number, since it uses less digits than its factorization.

2102120021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44003.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2102120021111 its reverse (1111200212012), we get a palindrome (3213320233123).

The spelling of 2102120021111 in words is "two trillion, one hundred two billion, one hundred twenty million, twenty-one thousand, one hundred eleven".