21222210212002 has 16 divisors (see below), whose sum is σ = 32931125796600. Its totient is φ = 10245170723200.

The previous prime is 21222210211999. The next prime is 21222210212083. The reversal of 21222210212002 is 20021201222212.

It can be written as a sum of positive squares in 4 ways, for example, as 15672327051241 + 5549883160761 = 3958829^2 + 2355819^2 .

It is an unprimeable number.

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, 30152502 + ... + 30848302.

Almost surely, 2^{21222210212002} is an apocalyptic number.

21222210212002 is a deficient number, since it is larger than the sum of its proper divisors (11708915584598).

21222210212002 is a wasteful number, since it uses less digits than its factorization.

21222210212002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221701.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21222210212002 its reverse (20021201222212), we get a palindrome (41243411434214).

The spelling of 21222210212002 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred ten million, two hundred twelve thousand, two".