21220212002 has 16 divisors (see below), whose sum is σ = 34945160832. Its totient is φ = 9584112720.

The previous prime is 21220211993. The next prime is 21220212011. The reversal of 21220212002 is 20021202212.

It is an interprime number because it is at equal distance from previous prime (21220211993) and next prime (21220212011).

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, 3068378 + ... + 3075285.

It is an arithmetic number, because the mean of its divisors is an integer number (2184072552).

Almost surely, 2^21220212002 is an apocalyptic number.

21220212002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21220212002 is a deficient number, since it is larger than the sum of its proper divisors (13724948830).

21220212002 is a wasteful number, since it uses less digits than its factorization.

21220212002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6143833.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21220212002 its reverse (20021202212), we get a palindrome (41241414214).

The spelling of 21220212002 in words is "twenty-one billion, two hundred twenty million, two hundred twelve thousand, two".