21603214127073 has 4 divisors (see below), whose sum is σ = 28804285502768. Its totient is φ = 14402142751380.

The previous prime is 21603214127063. The next prime is 21603214127087. The reversal of 21603214127073 is 37072141230612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21603214127073 - 2¹⁰ = 21603214126049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21603214127063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3600535687843 + ... + 3600535687848.

It is an arithmetic number, because the mean of its divisors is an integer number (7201071375692).

Almost surely, 2^{21603214127073} is an apocalyptic number.

It is an amenable number.

21603214127073 is a deficient number, since it is larger than the sum of its proper divisors (7201071375695).

21603214127073 is an equidigital number, since it uses as much as digits as its factorization.

21603214127073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7201071375694.

The product of its (nonzero) digits is 84672, while the sum is 39.

Adding to 21603214127073 its reverse (37072141230612), we get a palindrome (58675355357685).

The spelling of 21603214127073 in words is "twenty-one trillion, six hundred three billion, two hundred fourteen million, one hundred twenty-seven thousand, seventy-three".