102421001 has 16 divisors (see below), whose sum is σ = 113111040. Its totient is φ = 92307600.

The previous prime is 102420973. The next prime is 102421019. The reversal of 102421001 is 100124201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102421001 is a prime.

It is a super-2 number, since 2×102421001² = 20980122891684002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102421031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96926 + ... + 97976.

It is an arithmetic number, because the mean of its divisors is an integer number (7069440).

Almost surely, 2^102421001 is an apocalyptic number.

It is an amenable number.

102421001 is a deficient number, since it is larger than the sum of its proper divisors (10690039).

102421001 is a wasteful number, since it uses less digits than its factorization.

102421001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 102421001 is about 10120.3261311086. The cubic root of 102421001 is about 467.8748188948.

Adding to 102421001 its reverse (100124201), we get a palindrome (202545202).

The spelling of 102421001 in words is "one hundred two million, four hundred twenty-one thousand, one".