21120112020101 has 8 divisors (see below), whose sum is σ = 21420763789464. Its totient is φ = 20821255187200.

The previous prime is 21120112020067. The next prime is 21120112020107. The reversal of 21120112020101 is 10102021102112.

It can be written as a sum of positive squares in 4 ways, for example, as 9382642872100 + 11737469148001 = 3063110^2 + 3425999^2 .

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 21120112020101 - 2¹⁸ = 21120111757957 is a prime.

It is a super-2 number, since 2×21120112020101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120112020107) 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, 448710416 + ... + 448757481.

It is an arithmetic number, because the mean of its divisors is an integer number (2677595473683).

Almost surely, 2^{21120112020101} is an apocalyptic number.

It is an amenable number.

21120112020101 is a deficient number, since it is larger than the sum of its proper divisors (300651769363).

21120112020101 is a wasteful number, since it uses less digits than its factorization.

21120112020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897468231.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21120112020101 its reverse (10102021102112), we get a palindrome (31222133122213).

The spelling of 21120112020101 in words is "twenty-one trillion, one hundred twenty billion, one hundred twelve million, twenty thousand, one hundred one".