102121015 has 16 divisors (see below), whose sum is σ = 125277696. Its totient is φ = 79891200.

The previous prime is 102121013. The next prime is 102121021. The reversal of 102121015 is 510121201.

It is not a de Polignac number, because 102121015 - 2¹ = 102121013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102120986 and 102121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57379 + ... + 59131.

It is an arithmetic number, because the mean of its divisors is an integer number (7829856).

Almost surely, 2^102121015 is an apocalyptic number.

102121015 is a deficient number, since it is larger than the sum of its proper divisors (23156681).

102121015 is a wasteful number, since it uses less digits than its factorization.

102121015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 102121015 is about 10105.4942976581. The cubic root of 102121015 is about 467.4175781946.

Adding to 102121015 its reverse (510121201), we get a palindrome (612242216).

The spelling of 102121015 in words is "one hundred two million, one hundred twenty-one thousand, fifteen".