2156112211 has 16 divisors (see below), whose sum is σ = 2418454368. Its totient is φ = 1904947200.

The previous prime is 2156112199. The next prime is 2156112221. The reversal of 2156112211 is 1122116512.

It is a cyclic number.

It is not a de Polignac number, because 2156112211 - 2¹⁹ = 2155587923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2156112221) 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, 429331 + ... + 434323.

It is an arithmetic number, because the mean of its divisors is an integer number (151153398).

Almost surely, 2^2156112211 is an apocalyptic number.

2156112211 is a deficient number, since it is larger than the sum of its proper divisors (262342157).

2156112211 is a wasteful number, since it uses less digits than its factorization.

2156112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6102.

The product of its digits is 240, while the sum is 22.

The square root of 2156112211 is about 46433.9553667357. The cubic root of 2156112211 is about 1291.8847938488.

Adding to 2156112211 its reverse (1122116512), we get a palindrome (3278228723).

It can be divided in two parts, 2156 and 112211, that multiplied together give a square (241926916 = 15554²).

The spelling of 2156112211 in words is "two billion, one hundred fifty-six million, one hundred twelve thousand, two hundred eleven".