2121153711 has 16 divisors (see below), whose sum is σ = 2978096640. Its totient is φ = 1339208640.

The previous prime is 2121153707. The next prime is 2121153739. The reversal of 2121153711 is 1173511212.

It is not a de Polignac number, because 2121153711 - 2² = 2121153707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121153701) 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, 239091 + ... + 247803.

It is an arithmetic number, because the mean of its divisors is an integer number (186131040).

Almost surely, 2^2121153711 is an apocalyptic number.

2121153711 is a deficient number, since it is larger than the sum of its proper divisors (856942929).

2121153711 is a wasteful number, since it uses less digits than its factorization.

2121153711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13006.

The product of its digits is 420, while the sum is 24.

The square root of 2121153711 is about 46055.9845297004. The cubic root of 2121153711 is about 1284.8646490493.

Adding to 2121153711 its reverse (1173511212), we get a palindrome (3294664923).

The spelling of 2121153711 in words is "two billion, one hundred twenty-one million, one hundred fifty-three thousand, seven hundred eleven".