2102021011111 has 4 divisors (see below), whose sum is σ = 2402309726992. Its totient is φ = 1801732295232.

The previous prime is 2102021011093. The next prime is 2102021011283. The reversal of 2102021011111 is 1111101202012.

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 2102021011111 - 2⁹ = 2102021010599 is a prime.

It is a super-2 number, since 2×2102021011111² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2102021011091 and 2102021011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102021011411) 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, 150144357930 + ... + 150144357943.

It is an arithmetic number, because the mean of its divisors is an integer number (600577431748).

Almost surely, 2^{2102021011111} is an apocalyptic number.

2102021011111 is a deficient number, since it is larger than the sum of its proper divisors (300288715881).

2102021011111 is an equidigital number, since it uses as much as digits as its factorization.

2102021011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300288715880.

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

Adding to 2102021011111 its reverse (1111101202012), we get a palindrome (3213122213123).

The spelling of 2102021011111 in words is "two trillion, one hundred two billion, twenty-one million, eleven thousand, one hundred eleven".