21203031310 has 8 divisors (see below), whose sum is σ = 38165456376. Its totient is φ = 8481212520.

The previous prime is 21203031299. The next prime is 21203031341. The reversal of 21203031310 is 1313030212.

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

It is a super-2 number, since 2×21203031310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 1060151556 + ... + 1060151575.

It is an arithmetic number, because the mean of its divisors is an integer number (4770682047).

Almost surely, 2^21203031310 is an apocalyptic number.

21203031310 is a deficient number, since it is larger than the sum of its proper divisors (16962425066).

21203031310 is a wasteful number, since it uses less digits than its factorization.

21203031310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120303138.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21203031310 its reverse (1313030212), we get a palindrome (22516061522).

The spelling of 21203031310 in words is "twenty-one billion, two hundred three million, thirty-one thousand, three hundred ten".