21220002002101 has 24 divisors (see below), whose sum is σ = 25547069956320. Its totient is φ = 17553548914272.

The previous prime is 21220002002093. The next prime is 21220002002137. The reversal of 21220002002101 is 10120020002212.

It is a happy number.

It is not a de Polignac number, because 21220002002101 - 2³ = 21220002002093 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 (21220002002161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141531 + ... + 6516136.

It is an arithmetic number, because the mean of its divisors is an integer number (1064461248180).

Almost surely, 2^{21220002002101} is an apocalyptic number.

It is an amenable number.

21220002002101 is a deficient number, since it is larger than the sum of its proper divisors (4327067954219).

21220002002101 is a wasteful number, since it uses less digits than its factorization.

21220002002101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6659953 (or 6659946 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21220002002101 its reverse (10120020002212), we get a palindrome (31340022004313).

The spelling of 21220002002101 in words is "twenty-one trillion, two hundred twenty billion, two million, two thousand, one hundred one".