21230011140 has 48 divisors (see below), whose sum is σ = 64016651328. Its totient is φ = 5225848704.

The previous prime is 21230011129. The next prime is 21230011147. The reversal of 21230011140 is 4111003212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (21230011147) 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, 13608202 + ... + 13609761.

It is an arithmetic number, because the mean of its divisors is an integer number (1333680236).

Almost surely, 2^21230011140 is an apocalyptic number.

21230011140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230011140 is an abundant number, since it is smaller than the sum of its proper divisors (42786640188).

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

21230011140 is a wasteful number, since it uses less digits than its factorization.

21230011140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27217988 (or 27217986 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21230011140 its reverse (4111003212), we get a palindrome (25341014352).

The spelling of 21230011140 in words is "twenty-one billion, two hundred thirty million, eleven thousand, one hundred forty".