21022220021002 has 16 divisors (see below), whose sum is σ = 33391202095872. Its totient is φ = 9891929333440.

The previous prime is 21022220020961. The next prime is 21022220021039. The reversal of 21022220021002 is 20012002222012.

It is a super-2 number, since 2×21022220021002² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27114874 + ... + 27879397.

It is an arithmetic number, because the mean of its divisors is an integer number (2086950130992).

Almost surely, 2^{21022220021002} is an apocalyptic number.

21022220021002 is a deficient number, since it is larger than the sum of its proper divisors (12368982074870).

21022220021002 is a wasteful number, since it uses less digits than its factorization.

21022220021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55005533.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21022220021002 its reverse (20012002222012), we get a palindrome (41034222243014).

The spelling of 21022220021002 in words is "twenty-one trillion, twenty-two billion, two hundred twenty million, twenty-one thousand, two".