101421001 has 4 divisors (see below), whose sum is σ = 110641104. Its totient is φ = 92200900.

The previous prime is 101420999. The next prime is 101421029. The reversal of 101421001 is 100124101.

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 101421001 - 2¹ = 101420999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101421401) 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, 4610035 + ... + 4610056.

It is an arithmetic number, because the mean of its divisors is an integer number (27660276).

Almost surely, 2^101421001 is an apocalyptic number.

101421001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101421001 is a deficient number, since it is larger than the sum of its proper divisors (9220103).

101421001 is an equidigital number, since it uses as much as digits as its factorization.

101421001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9220102.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 101421001 is about 10070.7994220916. The cubic root of 101421001 is about 466.3471183719.

Adding to 101421001 its reverse (100124101), we get a palindrome (201545102).

The spelling of 101421001 in words is "one hundred one million, four hundred twenty-one thousand, one".