21663226230501 has 16 divisors (see below), whose sum is σ = 29827446860288. Its totient is φ = 13970934259200.

The previous prime is 21663226230493. The next prime is 21663226230517. The reversal of 21663226230501 is 10503262236612.

It is not a de Polignac number, because 21663226230501 - 2³ = 21663226230493 is a prime.

It is a super-2 number, since 2×21663226230501² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21663226230501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21663226230601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44261380 + ... + 44748141.

It is an arithmetic number, because the mean of its divisors is an integer number (1864215428768).

Almost surely, 2^{21663226230501} is an apocalyptic number.

It is an amenable number.

21663226230501 is a deficient number, since it is larger than the sum of its proper divisors (8164220629787).

21663226230501 is a wasteful number, since it uses less digits than its factorization.

21663226230501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89012172.

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 21663226230501 in words is "twenty-one trillion, six hundred sixty-three billion, two hundred twenty-six million, two hundred thirty thousand, five hundred one".