21202020212202 has 24 divisors (see below), whose sum is σ = 45937810769760. Its totient is φ = 7067324638440.

The previous prime is 21202020212173. The next prime is 21202020212237. The reversal of 21202020212202 is 20221202020212.

21202020212202 is a `hidden beast` number, since 212 + 0 + 20 + 20 + 212 + 202 = 666.

It is a super-2 number, since 2×21202020212202² (a number of 27 digits) contains 22 as substring.

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 (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9742177 + ... + 11718107.

It is an arithmetic number, because the mean of its divisors is an integer number (1914075448740).

Almost surely, 2^{21202020212202} is an apocalyptic number.

21202020212202 is an abundant number, since it is smaller than the sum of its proper divisors (24735790557558).

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

21202020212202 is a wasteful number, since it uses less digits than its factorization.

21202020212202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572058 (or 2572055 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21202020212202 its reverse (20221202020212), we get a palindrome (41423222232414).

It can be divided in two parts, 21202020212 and 202, that multiplied together give a palindrome (4282808082824).

The spelling of 21202020212202 in words is "twenty-one trillion, two hundred two billion, twenty million, two hundred twelve thousand, two hundred two".