21010003131 has 32 divisors (see below), whose sum is σ = 31505886720. Its totient is φ = 12356872704.

The previous prime is 21010003111. The next prime is 21010003159. The reversal of 21010003131 is 13130001012.

It is not a de Polignac number, because 21010003131 - 2⁵ = 21010003099 is a prime.

It is a super-2 number, since 2×21010003131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21010003111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1154380 + ... + 1172438.

It is an arithmetic number, because the mean of its divisors is an integer number (984558960).

Almost surely, 2^21010003131 is an apocalyptic number.

21010003131 is a deficient number, since it is larger than the sum of its proper divisors (10495883589).

21010003131 is a wasteful number, since it uses less digits than its factorization.

21010003131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19395.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 21010003131 its reverse (13130001012), we get a palindrome (34140004143).

The spelling of 21010003131 in words is "twenty-one billion, ten million, three thousand, one hundred thirty-one".