21013312201123 has 8 divisors (see below), whose sum is σ = 22926522862080. Its totient is φ = 19100586465480.

The previous prime is 21013312201081. The next prime is 21013312201139. The reversal of 21013312201123 is 32110221331012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21013312201123 is a prime.

It is a super-2 number, since 2×21013312201123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21013312201094 and 21013312201103.

It is not an unprimeable number, because it can be changed into a prime (21013312207123) 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, 121140715 + ... + 121314052.

It is an arithmetic number, because the mean of its divisors is an integer number (2865815357760).

Almost surely, 2^{21013312201123} is an apocalyptic number.

21013312201123 is a deficient number, since it is larger than the sum of its proper divisors (1913210660957).

21013312201123 is a wasteful number, since it uses less digits than its factorization.

21013312201123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242462657.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21013312201123 its reverse (32110221331012), we get a palindrome (53123533532135).

The spelling of 21013312201123 in words is "twenty-one trillion, thirteen billion, three hundred twelve million, two hundred one thousand, one hundred twenty-three".