21212122201202 has 8 divisors (see below), whose sum is σ = 31833561840300. Its totient is φ = 10600934921104.

The previous prime is 21212122201199. The next prime is 21212122201307. The reversal of 21212122201202 is 20210222121212.

It can be written as a sum of positive squares in 2 ways, for example, as 20874655316641 + 337466884561 = 4568879^2 + 580919^2 .

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, 2563084577 + ... + 2563092852.

Almost surely, 2^{21212122201202} is an apocalyptic number.

21212122201202 is a deficient number, since it is larger than the sum of its proper divisors (10621439639098).

21212122201202 is a wasteful number, since it uses less digits than its factorization.

21212122201202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5126179500.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21212122201202 its reverse (20210222121212), we get a palindrome (41422344322414).

The spelling of 21212122201202 in words is "twenty-one trillion, two hundred twelve billion, one hundred twenty-two million, two hundred one thousand, two hundred two".