21003031010 has 48 divisors (see below), whose sum is σ = 40982630400. Its totient is φ = 7746373440.

The previous prime is 21003031001. The next prime is 21003031031. The reversal of 21003031010 is 1013030012.

It is a super-2 number, since 2×21003031010² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003030982 and 21003031000.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1634591 + ... + 1647389.

It is an arithmetic number, because the mean of its divisors is an integer number (853804800).

Almost surely, 2^21003031010 is an apocalyptic number.

21003031010 is a deficient number, since it is larger than the sum of its proper divisors (19979599390).

21003031010 is a wasteful number, since it uses less digits than its factorization.

21003031010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13803 (or 13790 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 21003031010 its reverse (1013030012), we get a palindrome (22016061022).

The spelling of 21003031010 in words is "twenty-one billion, three million, thirty-one thousand, ten".