21400112 has 10 divisors (see below), whose sum is σ = 41462748. Its totient is φ = 10700048.

The previous prime is 21400109. The next prime is 21400121. The reversal of 21400112 is 21100412.

It is a super-2 number, since 2×21400112² = 915929587225088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21400093 and 21400102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 668738 + ... + 668769.

Almost surely, 2^21400112 is an apocalyptic number.

It is an amenable number.

21400112 is a deficient number, since it is larger than the sum of its proper divisors (20062636).

21400112 is a wasteful number, since it uses less digits than its factorization.

21400112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337515 (or 1337509 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 21400112 is about 4626.0255079279. The cubic root of 21400112 is about 277.6335941981.

Adding to 21400112 its reverse (21100412), we get a palindrome (42500524).

It can be divided in two parts, 21400 and 112, that added together give a palindrome (21512).

The spelling of 21400112 in words is "twenty-one million, four hundred thousand, one hundred twelve".