21011101021202 has 8 divisors (see below), whose sum is σ = 31522073302476. Its totient is φ = 10503743253712.

The previous prime is 21011101021193. The next prime is 21011101021217. The reversal of 21011101021202 is 20212010111012.

It can be written as a sum of positive squares in 2 ways, for example, as 21008756427961 + 2344593241 = 4583531^2 + 48421^2 .

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

It is a super-2 number, since 2×21011101021202² (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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 903613913 + ... + 903637164.

Almost surely, 2^{21011101021202} is an apocalyptic number.

21011101021202 is a deficient number, since it is larger than the sum of its proper divisors (10510972281274).

21011101021202 is a wasteful number, since it uses less digits than its factorization.

21011101021202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807256892.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21011101021202 its reverse (20212010111012), we get a palindrome (41223111132214).

The spelling of 21011101021202 in words is "twenty-one trillion, eleven billion, one hundred one million, twenty-one thousand, two hundred two".