121522501 has 8 divisors (see below), whose sum is σ = 127036224. Its totient is φ = 116028000.

The previous prime is 121522459. The next prime is 121522517. The reversal of 121522501 is 105225121.

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 121522501 - 2¹⁷ = 121391429 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 (121522561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9001 + ... + 18001.

It is an arithmetic number, because the mean of its divisors is an integer number (15879528).

Almost surely, 2^121522501 is an apocalyptic number.

121522501 is the 9001-st pentagonal number.

It is an amenable number.

121522501 is a deficient number, since it is larger than the sum of its proper divisors (5513723).

121522501 is an equidigital number, since it uses as much as digits as its factorization.

121522501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9611.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 121522501 is about 11023.7244613606. The cubic root of 121522501 is about 495.3196602062.

Adding to 121522501 its reverse (105225121), we get a palindrome (226747622).

It can be divided in two parts, 1215 and 22501, that added together give a square (23716 = 154²).

The spelling of 121522501 in words is "one hundred twenty-one million, five hundred twenty-two thousand, five hundred one".