2120211220111 has 4 divisors (see below), whose sum is σ = 2169518457832. Its totient is φ = 2070903982392.

The previous prime is 2120211220109. The next prime is 2120211220129. The reversal of 2120211220111 is 1110221120212.

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 2120211220111 - 2¹ = 2120211220109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120211229111) 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, 24653618796 + ... + 24653618881.

It is an arithmetic number, because the mean of its divisors is an integer number (542379614458).

Almost surely, 2^{2120211220111} is an apocalyptic number.

2120211220111 is a deficient number, since it is larger than the sum of its proper divisors (49307237721).

2120211220111 is an equidigital number, since it uses as much as digits as its factorization.

2120211220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49307237720.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2120211220111 its reverse (1110221120212), we get a palindrome (3230432340323).

The spelling of 2120211220111 in words is "two trillion, one hundred twenty billion, two hundred eleven million, two hundred twenty thousand, one hundred eleven".