21222001002 has 16 divisors (see below), whose sum is σ = 43907588640. Its totient is φ = 6830069232.

The previous prime is 21222000977. The next prime is 21222001079. The reversal of 21222001002 is 20010022212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60982588 + ... + 60982935.

It is an arithmetic number, because the mean of its divisors is an integer number (2744224290).

Almost surely, 2^21222001002 is an apocalyptic number.

21222001002 is an abundant number, since it is smaller than the sum of its proper divisors (22685587638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21222001002 is a wasteful number, since it uses less digits than its factorization.

21222001002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121965557.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21222001002 its reverse (20010022212), we get a palindrome (41232023214).

The spelling of 21222001002 in words is "twenty-one billion, two hundred twenty-two million, one thousand, two".