102102121001 has 4 divisors (see below), whose sum is σ = 102125602500. Its totient is φ = 102078639504.

The previous prime is 102102120977. The next prime is 102102121013. The reversal of 102102121001 is 100121201201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100121201201 = 7 ⋅14303028743.

It can be written as a sum of positive squares in 2 ways, for example, as 55554490000 + 46547631001 = 235700^2 + 215749^2 .

It is a cyclic number.

It is not a de Polignac number, because 102102121001 - 2¹⁸ = 102101858857 is a prime.

It is a super-2 number, since 2×102102121001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102102124001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11734226 + ... + 11742923.

It is an arithmetic number, because the mean of its divisors is an integer number (25531400625).

Almost surely, 2^102102121001 is an apocalyptic number.

It is an amenable number.

102102121001 is a deficient number, since it is larger than the sum of its proper divisors (23481499).

102102121001 is an equidigital number, since it uses as much as digits as its factorization.

102102121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23481498.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 102102121001 its reverse (100121201201), we get a palindrome (202223322202).

The spelling of 102102121001 in words is "one hundred two billion, one hundred two million, one hundred twenty-one thousand, one".