21110402 has 8 divisors (see below), whose sum is σ = 31699200. Its totient is φ = 10544004.

The previous prime is 21110393. The next prime is 21110423. The reversal of 21110402 is 20401112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3002 + ... + 7157.

It is an arithmetic number, because the mean of its divisors is an integer number (3962400).

Almost surely, 2^21110402 is an apocalyptic number.

21110402 is a deficient number, since it is larger than the sum of its proper divisors (10588798).

21110402 is a wasteful number, since it uses less digits than its factorization.

21110402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11200.

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

The square root of 21110402 is about 4594.6057502249. The cubic root of 21110402 is about 276.3750502282.

Adding to 21110402 its reverse (20401112), we get a palindrome (41511514).

It can be divided in two parts, 21110 and 402, that added together give a palindrome (21512).

The spelling of 21110402 in words is "twenty-one million, one hundred ten thousand, four hundred two".