21011302221123 has 8 divisors (see below), whose sum is σ = 28081931371200. Its totient is φ = 13974103942568.

The previous prime is 21011302221053. The next prime is 21011302221131. The reversal of 21011302221123 is 32112220311012.

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 21011302221123 - 2¹⁰ = 21011302220099 is a prime.

It is a super-2 number, since 2×21011302221123² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21011302221123.

It is not an unprimeable number, because it can be changed into a prime (21011302221193) 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, 8357716413 + ... + 8357718926.

It is an arithmetic number, because the mean of its divisors is an integer number (3510241421400).

Almost surely, 2^{21011302221123} is an apocalyptic number.

21011302221123 is a deficient number, since it is larger than the sum of its proper divisors (7070629150077).

21011302221123 is a wasteful number, since it uses less digits than its factorization.

21011302221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16715435761.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21011302221123 its reverse (32112220311012), we get a palindrome (53123522532135).

The spelling of 21011302221123 in words is "twenty-one trillion, eleven billion, three hundred two million, two hundred twenty-one thousand, one hundred twenty-three".