21102211430 has 32 divisors (see below), whose sum is σ = 38576926080. Its totient is φ = 8310107520.

The previous prime is 21102211409. The next prime is 21102211451. The reversal of 21102211430 is 3411220112.

It is an interprime number because it is at equal distance from previous prime (21102211409) and next prime (21102211451).

It is a junction number, because it is equal to n+sod(n) for n = 21102211399 and 21102211408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109475 + ... + 232785.

It is an arithmetic number, because the mean of its divisors is an integer number (1205528940).

Almost surely, 2^21102211430 is an apocalyptic number.

21102211430 is a deficient number, since it is larger than the sum of its proper divisors (17474714650).

21102211430 is a wasteful number, since it uses less digits than its factorization.

21102211430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123584.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21102211430 its reverse (3411220112), we get a palindrome (24513431542).

The spelling of 21102211430 in words is "twenty-one billion, one hundred two million, two hundred eleven thousand, four hundred thirty".