21220303033 has 8 divisors (see below), whose sum is σ = 22258861056. Its totient is φ = 20191406400.

The previous prime is 21220302973. The next prime is 21220303037. The reversal of 21220303033 is 33030302212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21220303033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21220303033.

It is not an unprimeable number, because it can be changed into a prime (21220303037) 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, 2410848 + ... + 2419633.

It is an arithmetic number, because the mean of its divisors is an integer number (2782357632).

Almost surely, 2^21220303033 is an apocalyptic number.

21220303033 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21220303033 is a deficient number, since it is larger than the sum of its proper divisors (1038558023).

21220303033 is a wasteful number, since it uses less digits than its factorization.

21220303033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4830695.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 21220303033 its reverse (33030302212), we get a palindrome (54250605245).

The spelling of 21220303033 in words is "twenty-one billion, two hundred twenty million, three hundred three thousand, thirty-three".