21331202213101 has 6 divisors (see below), whose sum is σ = 23446693341806. Its totient is φ = 19392002011800.

The previous prime is 21331202213081. The next prime is 21331202213179. The reversal of 21331202213101 is 10131220213312.

It can be written as a sum of positive squares in only one way, i.e., 16205664691876 + 5125537521225 = 4025626^2 + 2263965^2 .

It is not a de Polignac number, because 21331202213101 - 2²¹ = 21331200115949 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 (21331202213501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88145463570 + ... + 88145463811.

Almost surely, 2^{21331202213101} is an apocalyptic number.

It is an amenable number.

21331202213101 is a deficient number, since it is larger than the sum of its proper divisors (2115491128705).

21331202213101 is a wasteful number, since it uses less digits than its factorization.

21331202213101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176290927403 (or 176290927392 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21331202213101 its reverse (10131220213312), we get a palindrome (31462422426413).

The spelling of 21331202213101 in words is "twenty-one trillion, three hundred thirty-one billion, two hundred two million, two hundred thirteen thousand, one hundred one".