2131123011 has 32 divisors (see below), whose sum is σ = 3062880000. Its totient is φ = 1313970048.

The previous prime is 2131122967. The next prime is 2131123013. The reversal of 2131123011 is 1103211312.

It is a happy number.

It is not a de Polignac number, because 2131123011 - 2¹³ = 2131114819 is a prime.

It is a super-2 number, since 2×2131123011² = 9083370576027412242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2131123013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 498961 + ... + 503213.

It is an arithmetic number, because the mean of its divisors is an integer number (95715000).

Almost surely, 2^2131123011 is an apocalyptic number.

2131123011 is a deficient number, since it is larger than the sum of its proper divisors (931756989).

2131123011 is a wasteful number, since it uses less digits than its factorization.

2131123011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483.

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

The square root of 2131123011 is about 46164.0878930798. The cubic root of 2131123011 is about 1286.8744336006.

Adding to 2131123011 its reverse (1103211312), we get a palindrome (3234334323).

The spelling of 2131123011 in words is "two billion, one hundred thirty-one million, one hundred twenty-three thousand, eleven".