21124150123 has 8 divisors (see below), whose sum is σ = 21474394400. Its totient is φ = 20774033280.

The previous prime is 21124150121. The next prime is 21124150129. The reversal of 21124150123 is 32105142112.

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 21124150123 - 2¹ = 21124150121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21124150094 and 21124150103.

It is not an unprimeable number, because it can be changed into a prime (21124150121) 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, 337603 + ... + 395251.

It is an arithmetic number, because the mean of its divisors is an integer number (2684299300).

Almost surely, 2^21124150123 is an apocalyptic number.

21124150123 is a deficient number, since it is larger than the sum of its proper divisors (350244277).

21124150123 is an equidigital number, since it uses as much as digits as its factorization.

21124150123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63717.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 21124150123 its reverse (32105142112), we get a palindrome (53229292235).

The spelling of 21124150123 in words is "twenty-one billion, one hundred twenty-four million, one hundred fifty thousand, one hundred twenty-three".