21203022001 has 8 divisors (see below), whose sum is σ = 24232905920. Its totient is φ = 18173358288.

The previous prime is 21203021993. The next prime is 21203022037. The reversal of 21203022001 is 10022030212.

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

It is a cyclic number.

It is not a de Polignac number, because 21203022001 - 2³ = 21203021993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21203022101) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 349330 + ... + 405508.

It is an arithmetic number, because the mean of its divisors is an integer number (3029113240).

Almost surely, 2^21203022001 is an apocalyptic number.

It is an amenable number.

21203022001 is a deficient number, since it is larger than the sum of its proper divisors (3029883919).

21203022001 is an equidigital number, since it uses as much as digits as its factorization.

21203022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110103.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21203022001 its reverse (10022030212), we get a palindrome (31225052213).

It can be divided in two parts, 2120 and 3022001, that added together give a square (3024121 = 1739²).

The spelling of 21203022001 in words is "twenty-one billion, two hundred three million, twenty-two thousand, one".