21011230000 has 50 divisors (see below), whose sum is σ = 50870313164. Its totient is φ = 8404488000.

The previous prime is 21011229991. The next prime is 21011230067. The reversal of 21011230000 is 3211012.

It is a tau number, because it is divible by the number of its divisors (50).

It is a super-2 number, since 2×21011230000² (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 an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1040562 + ... + 1060561.

Almost surely, 2^21011230000 is an apocalyptic number.

21011230000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011230000 is an abundant number, since it is smaller than the sum of its proper divisors (29859083164).

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

21011230000 is an equidigital number, since it uses as much as digits as its factorization.

21011230000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101151 (or 2101130 counting only the distinct ones).

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

Adding to 21011230000 its reverse (3211012), we get a palindrome (21014441012).

The spelling of 21011230000 in words is "twenty-one billion, eleven million, two hundred thirty thousand".