21112202121101 has 16 divisors (see below), whose sum is σ = 25985794665600. Its totient is φ = 16703166126528.

The previous prime is 21112202121071. The next prime is 21112202121133. The reversal of 21112202121101 is 10112120221112.

It is not a de Polignac number, because 21112202121101 - 2¹⁴ = 21112202104717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21112202121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112202121151) 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, 5361491 + ... + 8424368.

It is an arithmetic number, because the mean of its divisors is an integer number (1624112166600).

Almost surely, 2^{21112202121101} is an apocalyptic number.

It is an amenable number.

21112202121101 is a deficient number, since it is larger than the sum of its proper divisors (4873592544499).

21112202121101 is a wasteful number, since it uses less digits than its factorization.

21112202121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13802708.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112202121101 its reverse (10112120221112), we get a palindrome (31224322342213).

The spelling of 21112202121101 in words is "twenty-one trillion, one hundred twelve billion, two hundred two million, one hundred twenty-one thousand, one hundred one".