21211012220002 has 16 divisors (see below), whose sum is σ = 34709488357824. Its totient is φ = 9641213838000.

The previous prime is 21211012219987. The next prime is 21211012220003. The reversal of 21211012220002 is 20002221011212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21211012220003) 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, 6365649 + ... + 9107332.

It is an arithmetic number, because the mean of its divisors is an integer number (2169343022364).

Almost surely, 2^{21211012220002} is an apocalyptic number.

21211012220002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21211012220002 is a deficient number, since it is larger than the sum of its proper divisors (13498476137822).

21211012220002 is a wasteful number, since it uses less digits than its factorization.

21211012220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15535305.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21211012220002 its reverse (20002221011212), we get a palindrome (41213233231214).

The spelling of 21211012220002 in words is "twenty-one trillion, two hundred eleven billion, twelve million, two hundred twenty thousand, two".