2123011311 has 8 divisors (see below), whose sum is σ = 2832869424. Its totient is φ = 1414247040.

The previous prime is 2123011309. The next prime is 2123011361. The reversal of 2123011311 is 1131103212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2123011311 - 2¹ = 2123011309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123011361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268920 + ... + 276701.

It is an arithmetic number, because the mean of its divisors is an integer number (354108678).

Almost surely, 2^2123011311 is an apocalyptic number.

2123011311 is a deficient number, since it is larger than the sum of its proper divisors (709858113).

2123011311 is a wasteful number, since it uses less digits than its factorization.

2123011311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546921.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2123011311 is about 46076.1468766649. The cubic root of 2123011311 is about 1285.2396129447.

Adding to 2123011311 its reverse (1131103212), we get a palindrome (3254114523).

The spelling of 2123011311 in words is "two billion, one hundred twenty-three million, eleven thousand, three hundred eleven".