21012000012101 has 16 divisors (see below), whose sum is σ = 25754529744000. Its totient is φ = 16740444322368.

The previous prime is 21012000012089. The next prime is 21012000012131. The reversal of 21012000012101 is 10121000021012.

It is a cyclic number.

It is not a de Polignac number, because 21012000012101 - 2³⁰ = 21010926270277 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 (21012000012131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1490417126 + ... + 1490431223.

It is an arithmetic number, because the mean of its divisors is an integer number (1609658109000).

Almost surely, 2^{21012000012101} is an apocalyptic number.

It is an amenable number.

21012000012101 is a deficient number, since it is larger than the sum of its proper divisors (4742529731899).

21012000012101 is a wasteful number, since it uses less digits than its factorization.

21012000012101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980848428.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21012000012101 its reverse (10121000021012), we get a palindrome (31133000033113).

The spelling of 21012000012101 in words is "twenty-one trillion, twelve billion, twelve thousand, one hundred one".