21000011230 has 16 divisors (see below), whose sum is σ = 41236385904. Its totient is φ = 7636367680.

The previous prime is 21000011173. The next prime is 21000011257. The reversal of 21000011230 is 3211000012.

It is a super-2 number, since 2×21000011230² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95454487 + ... + 95454706.

It is an arithmetic number, because the mean of its divisors is an integer number (2577274119).

Almost surely, 2^21000011230 is an apocalyptic number.

21000011230 is a deficient number, since it is larger than the sum of its proper divisors (20236374674).

21000011230 is a wasteful number, since it uses less digits than its factorization.

21000011230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190909211.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 21000011230 its reverse (3211000012), we get a palindrome (24211011242).

The spelling of 21000011230 in words is "twenty-one billion, eleven thousand, two hundred thirty".