21400231112 has 32 divisors (see below), whose sum is σ = 43288068600. Its totient is φ = 9859643904.

The previous prime is 21400231109. The next prime is 21400231117. The reversal of 21400231112 is 21113200412.

It can be written as a sum of positive squares in 4 ways, for example, as 8801066596 + 12599164516 = 93814^2 + 112246^2 .

It is not an unprimeable number, because it can be changed into a prime (21400231117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121643 + ... + 239994.

Almost surely, 2^21400231112 is an apocalyptic number.

It is an amenable number.

21400231112 is an abundant number, since it is smaller than the sum of its proper divisors (21887837488).

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

21400231112 is a wasteful number, since it uses less digits than its factorization.

21400231112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362225 (or 362221 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21400231112 its reverse (21113200412), we get a palindrome (42513431524).

The spelling of 21400231112 in words is "twenty-one billion, four hundred million, two hundred thirty-one thousand, one hundred twelve".