21210101222202 has 64 divisors (see below), whose sum is σ = 49614976656000. Its totient is φ = 6697831555584.

The previous prime is 21210101222113. The next prime is 21210101222231. The reversal of 21210101222202 is 20222210101212.

It is a happy number.

21210101222202 is a `hidden beast` number, since 21 + 210 + 10 + 1 + 222 + 202 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120008074 + ... + 120184682.

It is an arithmetic number, because the mean of its divisors is an integer number (775234010250).

Almost surely, 2^{21210101222202} is an apocalyptic number.

21210101222202 is an abundant number, since it is smaller than the sum of its proper divisors (28404875433798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21210101222202 is a wasteful number, since it uses less digits than its factorization.

21210101222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293692 (or 293686 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21210101222202 its reverse (20222210101212), we get a palindrome (41432311323414).

The spelling of 21210101222202 in words is "twenty-one trillion, two hundred ten billion, one hundred one million, two hundred twenty-two thousand, two hundred two".