21200101132123 has 8 divisors (see below), whose sum is σ = 21547128414240. Its totient is φ = 20855492159040.

The previous prime is 21200101132103. The next prime is 21200101132153. The reversal of 21200101132123 is 32123110100212.

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 21200101132123 - 2¹³ = 21200101123931 is a prime.

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 21200101132123.

It is not an unprimeable number, because it can be changed into a prime (21200101132103) 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, 604559583 + ... + 604594648.

It is an arithmetic number, because the mean of its divisors is an integer number (2693391051780).

Almost surely, 2^{21200101132123} is an apocalyptic number.

21200101132123 is a deficient number, since it is larger than the sum of its proper divisors (347027282117).

21200101132123 is a wasteful number, since it uses less digits than its factorization.

21200101132123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209154517.

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

Adding to 21200101132123 its reverse (32123110100212), we get a palindrome (53323211232335).

The spelling of 21200101132123 in words is "twenty-one trillion, two hundred billion, one hundred one million, one hundred thirty-two thousand, one hundred twenty-three".