21011142310131 has 4 divisors (see below), whose sum is σ = 28014856413512. Its totient is φ = 14007428206752.

The previous prime is 21011142310129. The next prime is 21011142310157. The reversal of 21011142310131 is 13101324111012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21011142310131 - 2¹ = 21011142310129 is a prime.

It is a super-2 number, since 2×21011142310131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21011142310098 and 21011142310107.

It is not an unprimeable number, because it can be changed into a prime (21011142310331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3501857051686 + ... + 3501857051691.

It is an arithmetic number, because the mean of its divisors is an integer number (7003714103378).

Almost surely, 2^{21011142310131} is an apocalyptic number.

21011142310131 is a deficient number, since it is larger than the sum of its proper divisors (7003714103381).

21011142310131 is an equidigital number, since it uses as much as digits as its factorization.

21011142310131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7003714103380.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 21011142310131 its reverse (13101324111012), we get a palindrome (34112466421143).

The spelling of 21011142310131 in words is "twenty-one trillion, eleven billion, one hundred forty-two million, three hundred ten thousand, one hundred thirty-one".