2120111101 has 4 divisors (see below), whose sum is σ = 2131824604. Its totient is φ = 2108397600.

The previous prime is 2120111093. The next prime is 2120111153. The reversal of 2120111101 is 1011110212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 997928100 + 1122183001 = 31590^2 + 33499^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120111101 - 2³ = 2120111093 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 (2120117101) 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, 5856480 + ... + 5856841.

It is an arithmetic number, because the mean of its divisors is an integer number (532956151).

Almost surely, 2^2120111101 is an apocalyptic number.

It is an amenable number.

2120111101 is a deficient number, since it is larger than the sum of its proper divisors (11713503).

2120111101 is a wasteful number, since it uses less digits than its factorization.

2120111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11713502.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 2120111101 is about 46044.6641968426. The cubic root of 2120111101 is about 1284.6540981792.

Adding to 2120111101 its reverse (1011110212), we get a palindrome (3131221313).

It can be divided in two parts, 2120111 and 101, that added together give a palindrome (2120212).

The spelling of 2120111101 in words is "two billion, one hundred twenty million, one hundred eleven thousand, one hundred one".