21210212111202 has 32 divisors (see below), whose sum is σ = 47166834859200. Its totient is φ = 7065116178624.

The previous prime is 21210212111113. The next prime is 21210212111227. The reversal of 21210212111202 is 20211121201212.

21210212111202 is a `hidden beast` number, since 21 + 210 + 21 + 211 + 1 + 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137547927 + ... + 137702042.

It is an arithmetic number, because the mean of its divisors is an integer number (1473963589350).

Almost surely, 2^{21210212111202} is an apocalyptic number.

21210212111202 is an abundant number, since it is smaller than the sum of its proper divisors (25956622747998).

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

21210212111202 is a wasteful number, since it uses less digits than its factorization.

21210212111202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275251407 (or 275251401 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21210212111202 its reverse (20211121201212), we get a palindrome (41421333312414).

The spelling of 21210212111202 in words is "twenty-one trillion, two hundred ten billion, two hundred twelve million, one hundred eleven thousand, two hundred two".