102121108 has 12 divisors (see below), whose sum is σ = 189224532. Its totient is φ = 48056960.

The previous prime is 102121069. The next prime is 102121109. The reversal of 102121108 is 801121201.

It can be written as a sum of positive squares in 2 ways, for example, as 94711824 + 7409284 = 9732^2 + 2722^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102121091 and 102121100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750823 + ... + 750958.

It is an arithmetic number, because the mean of its divisors is an integer number (15768711).

Almost surely, 2^102121108 is an apocalyptic number.

It is an amenable number.

102121108 is a deficient number, since it is larger than the sum of its proper divisors (87103424).

102121108 is a wasteful number, since it uses less digits than its factorization.

102121108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501802 (or 1501800 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 102121108 is about 10105.4988991143. The cubic root of 102121108 is about 467.4177200845.

Adding to 102121108 its reverse (801121201), we get a palindrome (903242309).

The spelling of 102121108 in words is "one hundred two million, one hundred twenty-one thousand, one hundred eight".