21002212112101 has 8 divisors (see below), whose sum is σ = 22992463504224. Its totient is φ = 19025453950320.

The previous prime is 21002212112059. The next prime is 21002212112183. The reversal of 21002212112101 is 10121121220012.

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 21002212112101 - 2⁷ = 21002212111973 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 (21002212112191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3373304326 + ... + 3373310551.

It is an arithmetic number, because the mean of its divisors is an integer number (2874057938028).

Almost surely, 2^{21002212112101} is an apocalyptic number.

It is an amenable number.

21002212112101 is a deficient number, since it is larger than the sum of its proper divisors (1990251392123).

21002212112101 is a wasteful number, since it uses less digits than its factorization.

21002212112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6746615171.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21002212112101 its reverse (10121121220012), we get a palindrome (31123333332113).

The spelling of 21002212112101 in words is "twenty-one trillion, two billion, two hundred twelve million, one hundred twelve thousand, one hundred one".