21212202002 has 8 divisors (see below), whose sum is σ = 32133336012. Its totient is φ = 10501090000.

The previous prime is 21212201963. The next prime is 21212202041. The reversal of 21212202002 is 20020221212.

It is an interprime number because it is at equal distance from previous prime (21212201963) and next prime (21212202041).

It can be written as a sum of positive squares in 2 ways, for example, as 15113997721 + 6098204281 = 122939^2 + 78091^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52505249 + ... + 52505652.

Almost surely, 2^21212202002 is an apocalyptic number.

21212202002 is a deficient number, since it is larger than the sum of its proper divisors (10921134010).

21212202002 is a wasteful number, since it uses less digits than its factorization.

21212202002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105011004.

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

Adding to 21212202002 its reverse (20020221212), we get a palindrome (41232423214).

The spelling of 21212202002 in words is "twenty-one billion, two hundred twelve million, two hundred two thousand, two".