21212222010002 has 16 divisors (see below), whose sum is σ = 33202217405952. Its totient is φ = 10144829502720.

The previous prime is 21212222009987. The next prime is 21212222010037. The reversal of 21212222010002 is 20001022221212.

It is a happy number.

It is a super-2 number, since 2×21212222010002² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63503 + ... + 6513714.

It is an arithmetic number, because the mean of its divisors is an integer number (2075138587872).

Almost surely, 2^{21212222010002} is an apocalyptic number.

21212222010002 is a deficient number, since it is larger than the sum of its proper divisors (11989995395950).

21212222010002 is a wasteful number, since it uses less digits than its factorization.

21212222010002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6647353.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21212222010002 its reverse (20001022221212), we get a palindrome (41213244231214).

The spelling of 21212222010002 in words is "twenty-one trillion, two hundred twelve billion, two hundred twenty-two million, ten thousand, two".