121522621 has 4 divisors (see below), whose sum is σ = 132570144. Its totient is φ = 110475100.

The previous prime is 121522607. The next prime is 121522627. The reversal of 121522621 is 126225121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121522621 - 2¹³ = 121514429 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121522592 and 121522601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121522627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5523745 + ... + 5523766.

It is an arithmetic number, because the mean of its divisors is an integer number (33142536).

Almost surely, 2^121522621 is an apocalyptic number.

121522621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121522621 is a deficient number, since it is larger than the sum of its proper divisors (11047523).

121522621 is a wasteful number, since it uses less digits than its factorization.

121522621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11047522.

The product of its digits is 480, while the sum is 22.

The square root of 121522621 is about 11023.7299041658. The cubic root of 121522621 is about 495.3198232442.

Adding to 121522621 its reverse (126225121), we get a palindrome (247747742).

The spelling of 121522621 in words is "one hundred twenty-one million, five hundred twenty-two thousand, six hundred twenty-one".