21400102244 has 12 divisors (see below), whose sum is σ = 39078447744. Its totient is φ = 10234831464.

The previous prime is 21400102201. The next prime is 21400102247. The reversal of 21400102244 is 44220100412.

It is not an unprimeable number, because it can be changed into a prime (21400102247) 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 3 ways as a sum of consecutive naturals, for example, 116304812 + ... + 116304995.

It is an arithmetic number, because the mean of its divisors is an integer number (3256537312).

Almost surely, 2^21400102244 is an apocalyptic number.

It is an amenable number.

21400102244 is a deficient number, since it is larger than the sum of its proper divisors (17678345500).

21400102244 is a wasteful number, since it uses less digits than its factorization.

21400102244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232609834 (or 232609832 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21400102244 its reverse (44220100412), we get a palindrome (65620202656).

The spelling of 21400102244 in words is "twenty-one billion, four hundred million, one hundred two thousand, two hundred forty-four".