21011202121202 has 8 divisors (see below), whose sum is σ = 31517054315136. Its totient is φ = 10505517349492.

The previous prime is 21011202121177. The next prime is 21011202121241. The reversal of 21011202121202 is 20212120211012.

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

It is a super-2 number, since 2×21011202121202² (a number of 27 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 41541338 + ... + 42044085.

It is an arithmetic number, because the mean of its divisors is an integer number (3939631789392).

Almost surely, 2^{21011202121202} is an apocalyptic number.

21011202121202 is a deficient number, since it is larger than the sum of its proper divisors (10505852193934).

21011202121202 is a wasteful number, since it uses less digits than its factorization.

21011202121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83711112.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21011202121202 its reverse (20212120211012), we get a palindrome (41223322332214).

The spelling of 21011202121202 in words is "twenty-one trillion, eleven billion, two hundred two million, one hundred twenty-one thousand, two hundred two".