10145121215 has 4 divisors (see below), whose sum is σ = 12174145464. Its totient is φ = 8116096968.

The previous prime is 10145121211. The next prime is 10145121223. The reversal of 10145121215 is 51212154101.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 10145121215 - 2² = 10145121211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10145121211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1014512117 + ... + 1014512126.

It is an arithmetic number, because the mean of its divisors is an integer number (3043536366).

Almost surely, 2^10145121215 is an apocalyptic number.

10145121215 is a deficient number, since it is larger than the sum of its proper divisors (2029024249).

10145121215 is an equidigital number, since it uses as much as digits as its factorization.

10145121215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029024248.

The product of its (nonzero) digits is 400, while the sum is 23.

Adding to 10145121215 its reverse (51212154101), we get a palindrome (61357275316).

The spelling of 10145121215 in words is "ten billion, one hundred forty-five million, one hundred twenty-one thousand, two hundred fifteen".