2120221021111 has 16 divisors (see below), whose sum is σ = 2215552248000. Its totient is φ = 2025153681408.

The previous prime is 2120221021103. The next prime is 2120221021129. The reversal of 2120221021111 is 1111201220212.

It is a cyclic number.

It is not a de Polignac number, because 2120221021111 - 2³ = 2120221021103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120221021141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66555115 + ... + 66586963.

It is an arithmetic number, because the mean of its divisors is an integer number (138472015500).

Almost surely, 2^{2120221021111} is an apocalyptic number.

2120221021111 is a deficient number, since it is larger than the sum of its proper divisors (95331226889).

2120221021111 is a wasteful number, since it uses less digits than its factorization.

2120221021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35898.

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

Adding to 2120221021111 its reverse (1111201220212), we get a palindrome (3231422241323).

The spelling of 2120221021111 in words is "two trillion, one hundred twenty billion, two hundred twenty-one million, twenty-one thousand, one hundred eleven".