21300021123011 has 6 divisors (see below), whose sum is σ = 22009283013636. Its totient is φ = 20612923666500.

The previous prime is 21300021122987. The next prime is 21300021123067. The reversal of 21300021123011 is 11032112000312.

It is not a de Polignac number, because 21300021123011 - 2³⁴ = 21282841253827 is a prime.

It is a super-2 number, since 2×21300021123011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21300021123811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11082216065 + ... + 11082217986.

It is an arithmetic number, because the mean of its divisors is an integer number (3668213835606).

Almost surely, 2^{21300021123011} is an apocalyptic number.

21300021123011 is a deficient number, since it is larger than the sum of its proper divisors (709261890625).

21300021123011 is an equidigital number, since it uses as much as digits as its factorization.

21300021123011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22164434113 (or 22164434082 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21300021123011 its reverse (11032112000312), we get a palindrome (32332133123323).

The spelling of 21300021123011 in words is "twenty-one trillion, three hundred billion, twenty-one million, one hundred twenty-three thousand, eleven".