102545101121 has 4 divisors (see below), whose sum is σ = 102545741700. Its totient is φ = 102544460544.

The previous prime is 102545101093. The next prime is 102545101133. The reversal of 102545101121 is 121101545201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 70301871025 + 32243230096 = 265145^2 + 179564^2 .

It is a cyclic number.

It is not a de Polignac number, because 102545101121 - 2²² = 102540906817 is a prime.

It is a super-3 number, since 3×102545101121³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102545101171) 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, 150665 + ... + 477273.

It is an arithmetic number, because the mean of its divisors is an integer number (25636435425).

Almost surely, 2^102545101121 is an apocalyptic number.

It is an amenable number.

102545101121 is a deficient number, since it is larger than the sum of its proper divisors (640579).

102545101121 is an equidigital number, since it uses as much as digits as its factorization.

102545101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640578.

The product of its (nonzero) digits is 400, while the sum is 23.

Adding to 102545101121 its reverse (121101545201), we get a palindrome (223646646322).

The spelling of 102545101121 in words is "one hundred two billion, five hundred forty-five million, one hundred one thousand, one hundred twenty-one".