21110353402 has 8 divisors (see below), whose sum is σ = 32686998912. Its totient is φ = 10214687100.

The previous prime is 21110353339. The next prime is 21110353417. The reversal of 21110353402 is 20435301112.

It is a happy number.

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, 170244724 + ... + 170244847.

It is an arithmetic number, because the mean of its divisors is an integer number (4085874864).

Almost surely, 2^21110353402 is an apocalyptic number.

21110353402 is a deficient number, since it is larger than the sum of its proper divisors (11576645510).

21110353402 is a wasteful number, since it uses less digits than its factorization.

21110353402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340489604.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 21110353402 its reverse (20435301112), we get a palindrome (41545654514).

The spelling of 21110353402 in words is "twenty-one billion, one hundred ten million, three hundred fifty-three thousand, four hundred two".