102108052421 has 4 divisors (see below), whose sum is σ = 102162396000. Its totient is φ = 102053708844.

The previous prime is 102108052373. The next prime is 102108052469. The reversal of 102108052421 is 124250801201.

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 an interprime number because it is at equal distance from previous prime (102108052373) and next prime (102108052469).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102108052421 is a prime.

It is a super-2 number, since 2×102108052421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102108052471) 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, 27168971 + ... + 27172728.

It is an arithmetic number, because the mean of its divisors is an integer number (25540599000).

Almost surely, 2^102108052421 is an apocalyptic number.

It is an amenable number.

102108052421 is a deficient number, since it is larger than the sum of its proper divisors (54343579).

102108052421 is an equidigital number, since it uses as much as digits as its factorization.

102108052421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54343578.

The product of its (nonzero) digits is 1280, while the sum is 26.

Adding to 102108052421 its reverse (124250801201), we get a palindrome (226358853622).

The spelling of 102108052421 in words is "one hundred two billion, one hundred eight million, fifty-two thousand, four hundred twenty-one".