21230011012 has 48 divisors (see below), whose sum is σ = 43273487488. Its totient is φ = 8925396480.

The previous prime is 21230010983. The next prime is 21230011013. The reversal of 21230011012 is 21011003212.

It is a junction number, because it is equal to n+sod(n) for n = 21230010983 and 21230011001.

It is not an unprimeable number, because it can be changed into a prime (21230011013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428638 + ... + 475594.

Almost surely, 2^21230011012 is an apocalyptic number.

It is an amenable number.

21230011012 is an abundant number, since it is smaller than the sum of its proper divisors (22043476476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21230011012 is a wasteful number, since it uses less digits than its factorization.

21230011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47276 (or 47274 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21230011012 its reverse (21011003212), we get a palindrome (42241014224).

The spelling of 21230011012 in words is "twenty-one billion, two hundred thirty million, eleven thousand, twelve".