102121415 has 8 divisors (see below), whose sum is σ = 133686288. Its totient is φ = 74270080.

The previous prime is 102121391. The next prime is 102121417. The reversal of 102121415 is 514121201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102121415 - 2²² = 97927111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102121393 and 102121402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 928322 + ... + 928431.

It is an arithmetic number, because the mean of its divisors is an integer number (16710786).

Almost surely, 2^102121415 is an apocalyptic number.

102121415 is a deficient number, since it is larger than the sum of its proper divisors (31564873).

102121415 is a wasteful number, since it uses less digits than its factorization.

102121415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856769.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 102121415 is about 10105.5140888527. The cubic root of 102121415 is about 467.4181884731.

Adding to 102121415 its reverse (514121201), we get a palindrome (616242616).

The spelling of 102121415 in words is "one hundred two million, one hundred twenty-one thousand, four hundred fifteen".