21021031323303 has 16 divisors (see below), whose sum is σ = 30878778690432. Its totient is φ = 12613880180000.

The previous prime is 21021031323289. The next prime is 21021031323343. The reversal of 21021031323303 is 30332313012012.

It is not a de Polignac number, because 21021031323303 - 2⁶ = 21021031323239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021031323343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3153466713 + ... + 3153473378.

It is an arithmetic number, because the mean of its divisors is an integer number (1929923668152).

Almost surely, 2^{21021031323303} is an apocalyptic number.

21021031323303 is a deficient number, since it is larger than the sum of its proper divisors (9857747367129).

21021031323303 is a wasteful number, since it uses less digits than its factorization.

21021031323303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6306940206.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21021031323303 its reverse (30332313012012), we get a palindrome (51353344335315).

It can be divided in two parts, 210210 and 31323303, that added together give a palindrome (31533513).

The spelling of 21021031323303 in words is "twenty-one trillion, twenty-one billion, thirty-one million, three hundred twenty-three thousand, three hundred three".