21434222155501 has 8 divisors (see below), whose sum is σ = 21464701315200. Its totient is φ = 21403744852800.

The previous prime is 21434222155459. The next prime is 21434222155517. The reversal of 21434222155501 is 10555122243412.

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 21434222155501 - 2⁷ = 21434222155373 is a prime.

It is a super-2 number, since 2×21434222155501² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434222155561) 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, 23516326 + ... + 24410776.

It is an arithmetic number, because the mean of its divisors is an integer number (2683087664400).

Almost surely, 2^{21434222155501} is an apocalyptic number.

It is an amenable number.

21434222155501 is a deficient number, since it is larger than the sum of its proper divisors (30479159699).

21434222155501 is an equidigital number, since it uses as much as digits as its factorization.

21434222155501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928499.

The product of its (nonzero) digits is 96000, while the sum is 37.

Adding to 21434222155501 its reverse (10555122243412), we get a palindrome (31989344398913).

The spelling of 21434222155501 in words is "twenty-one trillion, four hundred thirty-four billion, two hundred twenty-two million, one hundred fifty-five thousand, five hundred one".