2131021011 has 32 divisors (see below), whose sum is σ = 3282370560. Its totient is φ = 1204622496.

The previous prime is 2131020977. The next prime is 2131021049. The reversal of 2131021011 is 1101201312.

It is not a de Polignac number, because 2131021011 - 2¹⁰ = 2131019987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2131021411) 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, 1116520 + ... + 1118426.

It is an arithmetic number, because the mean of its divisors is an integer number (102574080).

Almost surely, 2^2131021011 is an apocalyptic number.

2131021011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2131021011 is a deficient number, since it is larger than the sum of its proper divisors (1151349549).

2131021011 is a wasteful number, since it uses less digits than its factorization.

2131021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2463.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 2131021011 is about 46162.9831250105. The cubic root of 2131021011 is about 1286.8539024400.

Adding to 2131021011 its reverse (1101201312), we get a palindrome (3232222323).

The spelling of 2131021011 in words is "two billion, one hundred thirty-one million, twenty-one thousand, eleven".