21002212020101 has 8 divisors (see below), whose sum is σ = 23169419640024. Its totient is φ = 18913811950080.

The previous prime is 21002212020067. The next prime is 21002212020131. The reversal of 21002212020101 is 10102021220012.

It can be written as a sum of positive squares in 4 ways, for example, as 3052966431076 + 17949245589025 = 1747274^2 + 4236655^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21002212020101 - 2⁶ = 21002212020037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002212020131) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 19701886916 + ... + 19701887981.

It is an arithmetic number, because the mean of its divisors is an integer number (2896177455003).

Almost surely, 2^{21002212020101} is an apocalyptic number.

It is an amenable number.

21002212020101 is a deficient number, since it is larger than the sum of its proper divisors (2167207619923).

21002212020101 is a wasteful number, since it uses less digits than its factorization.

21002212020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39403774951.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21002212020101 its reverse (10102021220012), we get a palindrome (31104233240113).

The spelling of 21002212020101 in words is "twenty-one trillion, two billion, two hundred twelve million, twenty thousand, one hundred one".