21342533155501 has 8 divisors (see below), whose sum is σ = 21451718288000. Its totient is φ = 21233518493760.

The previous prime is 21342533155469. The next prime is 21342533155511. The reversal of 21342533155501 is 10555133524312.

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 21342533155501 - 2⁵ = 21342533155469 is a prime.

It is a super-2 number, since 2×21342533155501² (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 (21342533155511) 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, 42366651 + ... + 42867448.

It is an arithmetic number, because the mean of its divisors is an integer number (2681464786000).

Almost surely, 2^{21342533155501} is an apocalyptic number.

It is an amenable number.

21342533155501 is a deficient number, since it is larger than the sum of its proper divisors (109185132499).

21342533155501 is a wasteful number, since it uses less digits than its factorization.

21342533155501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85235379.

The product of its (nonzero) digits is 270000, while the sum is 40.

Adding to 21342533155501 its reverse (10555133524312), we get a palindrome (31897666679813).

The spelling of 21342533155501 in words is "twenty-one trillion, three hundred forty-two billion, five hundred thirty-three million, one hundred fifty-five thousand, five hundred one".