21130142311 has 4 divisors (see below), whose sum is σ = 21151994512. Its totient is φ = 21108290112.

The previous prime is 21130142309. The next prime is 21130142317. The reversal of 21130142311 is 11324103112.

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 21130142311 - 2¹ = 21130142309 is a prime.

It is a super-2 number, since 2×21130142311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130142317) 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 3 ways as a sum of consecutive naturals, for example, 10924650 + ... + 10926583.

It is an arithmetic number, because the mean of its divisors is an integer number (5287998628).

Almost surely, 2^21130142311 is an apocalyptic number.

21130142311 is a deficient number, since it is larger than the sum of its proper divisors (21852201).

21130142311 is an equidigital number, since it uses as much as digits as its factorization.

21130142311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21852200.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21130142311 its reverse (11324103112), we get a palindrome (32454245423).

The spelling of 21130142311 in words is "twenty-one billion, one hundred thirty million, one hundred forty-two thousand, three hundred eleven".