21151102 has 16 divisors (see below), whose sum is σ = 36447840. Its totient is φ = 9017568.

The previous prime is 21151069. The next prime is 21151147. The reversal of 21151102 is 20115112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1077 + ... + 6592.

It is an arithmetic number, because the mean of its divisors is an integer number (2277990).

Almost surely, 2^21151102 is an apocalyptic number.

21151102 is a deficient number, since it is larger than the sum of its proper divisors (15296738).

21151102 is a wasteful number, since it uses less digits than its factorization.

21151102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7875.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 21151102 is about 4599.0327243889. The cubic root of 21151102 is about 276.5525495074.

Adding to 21151102 its reverse (20115112), we get a palindrome (41266214).

It can be divided in two parts, 2115110 and 2, that added together give a palindrome (2115112).

The spelling of 21151102 in words is "twenty-one million, one hundred fifty-one thousand, one hundred two".