21144423122060 has 48 divisors (see below), whose sum is σ = 50746877771520. Its totient is φ = 7249479030720.

The previous prime is 21144423122059. The next prime is 21144423122107. The reversal of 21144423122060 is 6022132444112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49383095 + ... + 49809425.

It is an arithmetic number, because the mean of its divisors is an integer number (1057226620240).

Almost surely, 2^{21144423122060} is an apocalyptic number.

21144423122060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21144423122060 is an abundant number, since it is smaller than the sum of its proper divisors (29602454649460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21144423122060 is a wasteful number, since it uses less digits than its factorization.

21144423122060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780606 (or 780604 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 21144423122060 its reverse (6022132444112), we get a palindrome (27166555566172).

The spelling of 21144423122060 in words is "twenty-one trillion, one hundred forty-four billion, four hundred twenty-three million, one hundred twenty-two thousand, sixty".