12021501 has 16 divisors (see below), whose sum is σ = 16385600. Its totient is φ = 7838208.

The previous prime is 12021491. The next prime is 12021539. The reversal of 12021501 is 10512021.

It is not a de Polignac number, because 12021501 - 2¹¹ = 12019453 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021551) 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, 31530 + ... + 31908.

It is an arithmetic number, because the mean of its divisors is an integer number (1024100).

Almost surely, 2^12021501 is an apocalyptic number.

It is an amenable number.

12021501 is a deficient number, since it is larger than the sum of its proper divisors (4364099).

12021501 is a wasteful number, since it uses less digits than its factorization.

12021501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 12021501 is about 3467.2036282861. The cubic root of 12021501 is about 229.0795030425.

Adding to 12021501 its reverse (10512021), we get a palindrome (22533522).

The spelling of 12021501 in words is "twelve million, twenty-one thousand, five hundred one".