22121501 has 8 divisors (see below), whose sum is σ = 22619520. Its totient is φ = 21629088.

The previous prime is 22121483. The next prime is 22121503. The reversal of 22121501 is 10512122.

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

It is a cyclic number.

It is not a de Polignac number, because 22121501 - 2¹⁰ = 22120477 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 (22121503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7145 + ... + 9761.

It is an arithmetic number, because the mean of its divisors is an integer number (2827440).

Almost surely, 2^22121501 is an apocalyptic number.

It is an amenable number.

22121501 is a deficient number, since it is larger than the sum of its proper divisors (498019).

22121501 is a wasteful number, since it uses less digits than its factorization.

22121501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 22121501 is about 4703.3499763466. The cubic root of 22121501 is about 280.7188205700.

Adding to 22121501 its reverse (10512122), we get a palindrome (32633623).

It can be divided in two parts, 22121 and 501, that added together give a palindrome (22622).

The spelling of 22121501 in words is "twenty-two million, one hundred twenty-one thousand, five hundred one".