121521367 has 8 divisors (see below), whose sum is σ = 135389952. Its totient is φ = 108123000.

The previous prime is 121521353. The next prime is 121521371. The reversal of 121521367 is 763125121.

It is a happy number.

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 121521367 - 2¹¹ = 121519319 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 (121521377) 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, 117009 + ... + 118042.

It is an arithmetic number, because the mean of its divisors is an integer number (16923744).

Almost surely, 2^121521367 is an apocalyptic number.

121521367 is a deficient number, since it is larger than the sum of its proper divisors (13868585).

121521367 is a wasteful number, since it uses less digits than its factorization.

121521367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235109.

The product of its digits is 2520, while the sum is 28.

The square root of 121521367 is about 11023.6730267185. The cubic root of 121521367 is about 495.3181194923.

Adding to 121521367 its reverse (763125121), we get a palindrome (884646488).

The spelling of 121521367 in words is "one hundred twenty-one million, five hundred twenty-one thousand, three hundred sixty-seven".