21101300221123 has 8 divisors (see below), whose sum is σ = 22018956261408. Its totient is φ = 20183661531264.

The previous prime is 21101300221087. The next prime is 21101300221151. The reversal of 21101300221123 is 32112200310112.

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 21101300221123 - 2³⁷ = 20963861267651 is a prime.

It is a super-2 number, since 2×21101300221123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21101300221123.

It is not an unprimeable number, because it can be changed into a prime (21101301221123) 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, 1821286 + ... + 6746827.

It is an arithmetic number, because the mean of its divisors is an integer number (2752369532676).

Almost surely, 2^{21101300221123} is an apocalyptic number.

21101300221123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21101300221123 is a deficient number, since it is larger than the sum of its proper divisors (917656040285).

21101300221123 is a wasteful number, since it uses less digits than its factorization.

21101300221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8675213.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21101300221123 its reverse (32112200310112), we get a palindrome (53213500531235).

The spelling of 21101300221123 in words is "twenty-one trillion, one hundred one billion, three hundred million, two hundred twenty-one thousand, one hundred twenty-three".