102110202121 has 4 divisors (see below), whose sum is σ = 102760585732. Its totient is φ = 101459818512.

The previous prime is 102110202101. The next prime is 102110202127. The reversal of 102110202121 is 121202011201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19821542521 + 82288659600 = 140789^2 + 286860^2 .

It is a cyclic number.

It is not a de Polignac number, because 102110202121 - 2¹⁵ = 102110169353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102110202127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325191570 + ... + 325191883.

It is an arithmetic number, because the mean of its divisors is an integer number (25690146433).

Almost surely, 2^102110202121 is an apocalyptic number.

It is an amenable number.

102110202121 is a deficient number, since it is larger than the sum of its proper divisors (650383611).

102110202121 is an equidigital number, since it uses as much as digits as its factorization.

102110202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650383610.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102110202121 its reverse (121202011201), we get a palindrome (223312213322).

The spelling of 102110202121 in words is "one hundred two billion, one hundred ten million, two hundred two thousand, one hundred twenty-one".