21010310131 has 8 divisors (see below), whose sum is σ = 21315364704. Its totient is φ = 20705509440.

The previous prime is 21010310129. The next prime is 21010310159. The reversal of 21010310131 is 13101301012.

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

It is a cyclic number.

It is not a de Polignac number, because 21010310131 - 2¹ = 21010310129 is a prime.

It is a super-2 number, since 2×21010310131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010310731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106521 + ... + 231013.

It is an arithmetic number, because the mean of its divisors is an integer number (2664420588).

Almost surely, 2^21010310131 is an apocalyptic number.

21010310131 is a deficient number, since it is larger than the sum of its proper divisors (305054573).

21010310131 is a wasteful number, since it uses less digits than its factorization.

21010310131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126941.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 21010310131 its reverse (13101301012), we get a palindrome (34111611143).

The spelling of 21010310131 in words is "twenty-one billion, ten million, three hundred ten thousand, one hundred thirty-one".