2156135442211 has 4 divisors (see below), whose sum is σ = 2157114171352. Its totient is φ = 2155156713072.

The previous prime is 2156135442151. The next prime is 2156135442233. The reversal of 2156135442211 is 1122445316512.

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 2156135442211 - 2¹¹ = 2156135440163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156135442011) 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, 489361266 + ... + 489365671.

It is an arithmetic number, because the mean of its divisors is an integer number (539278542838).

Almost surely, 2^{2156135442211} is an apocalyptic number.

2156135442211 is a deficient number, since it is larger than the sum of its proper divisors (978729141).

2156135442211 is an equidigital number, since it uses as much as digits as its factorization.

2156135442211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978729140.

The product of its digits is 57600, while the sum is 37.

The spelling of 2156135442211 in words is "two trillion, one hundred fifty-six billion, one hundred thirty-five million, four hundred forty-two thousand, two hundred eleven".