22002021321 has 32 divisors (see below), whose sum is σ = 34001510400. Its totient is φ = 12395073600.

The previous prime is 22002021317. The next prime is 22002021323. The reversal of 22002021321 is 12312020022.

It is a happy number.

It is not a de Polignac number, because 22002021321 - 2² = 22002021317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22002021321.

It is not an unprimeable number, because it can be changed into a prime (22002021323) 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 31 ways as a sum of consecutive naturals, for example, 1153500 + ... + 1172418.

It is an arithmetic number, because the mean of its divisors is an integer number (1062547200).

Almost surely, 2^22002021321 is an apocalyptic number.

22002021321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22002021321 is a deficient number, since it is larger than the sum of its proper divisors (11999489079).

22002021321 is a wasteful number, since it uses less digits than its factorization.

22002021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19709.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 22002021321 its reverse (12312020022), we get a palindrome (34314041343).

The spelling of 22002021321 in words is "twenty-two billion, two million, twenty-one thousand, three hundred twenty-one".