21120101201223 has 24 divisors (see below), whose sum is σ = 31367881026768. Its totient is φ = 13683539475072.

The previous prime is 21120101201207. The next prime is 21120101201239. The reversal of 21120101201223 is 32210210102112.

21120101201223 is a `hidden beast` number, since 21 + 120 + 101 + 201 + 223 = 666.

It is an interprime number because it is at equal distance from previous prime (21120101201207) and next prime (21120101201239).

It is not a de Polignac number, because 21120101201223 - 2⁴ = 21120101201207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21120101201196 and 21120101201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120101209223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36717961 + ... + 37288722.

It is an arithmetic number, because the mean of its divisors is an integer number (1306995042782).

Almost surely, 2^{21120101201223} is an apocalyptic number.

21120101201223 is a deficient number, since it is larger than the sum of its proper divisors (10247779825545).

21120101201223 is a wasteful number, since it uses less digits than its factorization.

21120101201223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74007583 (or 74007580 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21120101201223 its reverse (32210210102112), we get a palindrome (53330311303335).

The spelling of 21120101201223 in words is "twenty-one trillion, one hundred twenty billion, one hundred one million, two hundred one thousand, two hundred twenty-three".