101421553 has 8 divisors (see below), whose sum is σ = 104936960. Its totient is φ = 97921440.

The previous prime is 101421547. The next prime is 101421569. The reversal of 101421553 is 355124101.

It is a happy number.

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 101421553 - 2¹⁷ = 101290481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101421503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10588 + ... + 17746.

It is an arithmetic number, because the mean of its divisors is an integer number (13117120).

Almost surely, 2^101421553 is an apocalyptic number.

It is an amenable number.

101421553 is a deficient number, since it is larger than the sum of its proper divisors (3515407).

101421553 is an equidigital number, since it uses as much as digits as its factorization.

101421553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7647.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 101421553 is about 10070.8268280216. The cubic root of 101421553 is about 466.3479644266.

Adding to 101421553 its reverse (355124101), we get a palindrome (456545654).

The spelling of 101421553 in words is "one hundred one million, four hundred twenty-one thousand, five hundred fifty-three".