21110121202101 has 32 divisors (see below), whose sum is σ = 29166723874560. Its totient is φ = 13570314476544.

The previous prime is 21110121202081. The next prime is 21110121202117. The reversal of 21110121202101 is 10120212101112.

It is a happy number.

It is not a de Polignac number, because 21110121202101 - 2¹⁴ = 21110121185717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110121202301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114463080 + ... + 114647358.

It is an arithmetic number, because the mean of its divisors is an integer number (911460121080).

Almost surely, 2^{21110121202101} is an apocalyptic number.

It is an amenable number.

21110121202101 is a deficient number, since it is larger than the sum of its proper divisors (8056602672459).

21110121202101 is a wasteful number, since it uses less digits than its factorization.

21110121202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193565.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21110121202101 its reverse (10120212101112), we get a palindrome (31230333303213).

The spelling of 21110121202101 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-one million, two hundred two thousand, one hundred one".