120101815 has 16 divisors (see below), whose sum is σ = 148428000. Its totient is φ = 93225600.

The previous prime is 120101803. The next prime is 120101819. The reversal of 120101815 is 518101021.

It is a happy number.

It is not a de Polignac number, because 120101815 - 2⁷ = 120101687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120101792 and 120101801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120101819) 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, 91665 + ... + 92965.

It is an arithmetic number, because the mean of its divisors is an integer number (9276750).

Almost surely, 2^120101815 is an apocalyptic number.

120101815 is a deficient number, since it is larger than the sum of its proper divisors (28326185).

120101815 is a wasteful number, since it uses less digits than its factorization.

120101815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 120101815 is about 10959.0973624656. The cubic root of 120101815 is about 493.3818739775.

Adding to 120101815 its reverse (518101021), we get a palindrome (638202836).

The spelling of 120101815 in words is "one hundred twenty million, one hundred one thousand, eight hundred fifteen".