21230123002011 has 48 divisors (see below), whose sum is σ = 38233039373568. Its totient is φ = 11028509294400.

The previous prime is 21230123002007. The next prime is 21230123002013. The reversal of 21230123002011 is 11020032103212.

21230123002011 is a `hidden beast` number, since 2 + 1 + 230 + 1 + 230 + 0 + 201 + 1 = 666.

It is not a de Polignac number, because 21230123002011 - 2² = 21230123002007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21230123002013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119620840 + ... + 119798186.

It is an arithmetic number, because the mean of its divisors is an integer number (796521653616).

Almost surely, 2^{21230123002011} is an apocalyptic number.

21230123002011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21230123002011 is a deficient number, since it is larger than the sum of its proper divisors (17002916371557).

21230123002011 is a wasteful number, since it uses less digits than its factorization.

21230123002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350112 (or 350109 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21230123002011 its reverse (11020032103212), we get a palindrome (32250155105223).

The spelling of 21230123002011 in words is "twenty-one trillion, two hundred thirty billion, one hundred twenty-three million, two thousand, eleven".