21124153550006 has 8 divisors (see below), whose sum is σ = 34123632657744. Its totient is φ = 9749609330760.

The previous prime is 21124153549991. The next prime is 21124153550009. The reversal of 21124153550006 is 60005535142112.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124153550009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406233722090 + ... + 406233722141.

It is an arithmetic number, because the mean of its divisors is an integer number (4265454082218).

Almost surely, 2^{21124153550006} is an apocalyptic number.

21124153550006 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21124153550006 is a deficient number, since it is larger than the sum of its proper divisors (12999479107738).

21124153550006 is a wasteful number, since it uses less digits than its factorization.

21124153550006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812467444246.

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 21124153550006 its reverse (60005535142112), we get a palindrome (81129688692118).

The spelling of 21124153550006 in words is "twenty-one trillion, one hundred twenty-four billion, one hundred fifty-three million, five hundred fifty thousand, six".