2120211021111 has 8 divisors (see below), whose sum is σ = 2838210770304. Its totient is φ = 1407842643000.

The previous prime is 2120211021101. The next prime is 2120211021133. The reversal of 2120211021111 is 1111201120212.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-2120211021111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120211021101) 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, 1407841891 + ... + 1407843396.

It is an arithmetic number, because the mean of its divisors is an integer number (354776346288).

Almost surely, 2^{2120211021111} is an apocalyptic number.

2120211021111 is a deficient number, since it is larger than the sum of its proper divisors (717999749193).

2120211021111 is a wasteful number, since it uses less digits than its factorization.

2120211021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815685541.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2120211021111 its reverse (1111201120212), we get a palindrome (3231412141323).

The spelling of 2120211021111 in words is "two trillion, one hundred twenty billion, two hundred eleven million, twenty-one thousand, one hundred eleven".