10121215 has 16 divisors (see below), whose sum is σ = 13362048. Its totient is φ = 7312896.

The previous prime is 10121183. The next prime is 10121233. The reversal of 10121215 is 51212101.

It is a cyclic number.

It is not a de Polignac number, because 10121215 - 2⁵ = 10121183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121195 and 10121204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1399 + ... + 4711.

It is an arithmetic number, because the mean of its divisors is an integer number (835128).

Almost surely, 2^10121215 is an apocalyptic number.

10121215 is a deficient number, since it is larger than the sum of its proper divisors (3240833).

10121215 is a wasteful number, since it uses less digits than its factorization.

10121215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378.

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

The square root of 10121215 is about 3181.3857043747. The cubic root of 10121215 is about 216.3104745832.

Adding to 10121215 its reverse (51212101), we get a palindrome (61333316).

It can be divided in two parts, 1012121 and 5, that multiplied together give a palindrome (5060605).

The spelling of 10121215 in words is "ten million, one hundred twenty-one thousand, two hundred fifteen".