21234105149 has 8 divisors (see below), whose sum is σ = 22160916672. Its totient is φ = 20307592800.

The previous prime is 21234105131. The next prime is 21234105161. The reversal of 21234105149 is 94150143212.

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

It is a cyclic number.

It is not a de Polignac number, because 21234105149 - 2¹⁶ = 21234039613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234105349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76817 + ... + 219929.

It is an arithmetic number, because the mean of its divisors is an integer number (2770114584).

Almost surely, 2^21234105149 is an apocalyptic number.

It is an amenable number.

21234105149 is a deficient number, since it is larger than the sum of its proper divisors (926811523).

21234105149 is a wasteful number, since it uses less digits than its factorization.

21234105149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149587.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 21234105149 in words is "twenty-one billion, two hundred thirty-four million, one hundred five thousand, one hundred forty-nine".