2142122111 has 16 divisors (see below), whose sum is σ = 2395150560. Its totient is φ = 1903887360.

The previous prime is 2142122083. The next prime is 2142122117. The reversal of 2142122111 is 1112212412.

It is a cyclic number.

It is not a de Polignac number, because 2142122111 - 2¹⁴ = 2142105727 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 2142122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142122117) 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, 91931 + ... + 112851.

It is an arithmetic number, because the mean of its divisors is an integer number (149696910).

Almost surely, 2^2142122111 is an apocalyptic number.

2142122111 is a deficient number, since it is larger than the sum of its proper divisors (253028449).

2142122111 is a wasteful number, since it uses less digits than its factorization.

2142122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21274.

The product of its digits is 64, while the sum is 17.

The square root of 2142122111 is about 46283.0650562384. The cubic root of 2142122111 is about 1289.0845639520.

Adding to 2142122111 its reverse (1112212412), we get a palindrome (3254334523).

The spelling of 2142122111 in words is "two billion, one hundred forty-two million, one hundred twenty-two thousand, one hundred eleven".