21120000020101 has 16 divisors (see below), whose sum is σ = 21534008008320. Its totient is φ = 20706572427840.

The previous prime is 21120000020083. The next prime is 21120000020107. The reversal of 21120000020101 is 10102000002112.

It is a cyclic number.

It is not a de Polignac number, because 21120000020101 - 2⁹ = 21120000019589 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 (21120000020107) 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, 432133696 + ... + 432182566.

It is an arithmetic number, because the mean of its divisors is an integer number (1345875500520).

Almost surely, 2^{21120000020101} is an apocalyptic number.

It is an amenable number.

21120000020101 is a deficient number, since it is larger than the sum of its proper divisors (414007988219).

21120000020101 is a wasteful number, since it uses less digits than its factorization.

21120000020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54636.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21120000020101 its reverse (10102000002112), we get a palindrome (31222000022213).

The spelling of 21120000020101 in words is "twenty-one trillion, one hundred twenty billion, twenty thousand, one hundred one".