121334521 has 32 divisors (see below), whose sum is σ = 159022080. Its totient is φ = 89812800.

The previous prime is 121334509. The next prime is 121334531. The reversal of 121334521 is 125433121.

It is a happy number.

It is not a de Polignac number, because 121334521 - 2⁵ = 121334489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121334492 and 121334501.

It is not an unprimeable number, because it can be changed into a prime (121334531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149206 + ... + 150016.

It is an arithmetic number, because the mean of its divisors is an integer number (4969440).

Almost surely, 2^121334521 is an apocalyptic number.

121334521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121334521 is a deficient number, since it is larger than the sum of its proper divisors (37687559).

121334521 is a wasteful number, since it uses less digits than its factorization.

121334521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925.

The product of its digits is 720, while the sum is 22.

The square root of 121334521 is about 11015.1950050828. The cubic root of 121334521 is about 495.0641293644.

Adding to 121334521 its reverse (125433121), we get a palindrome (246767642).

The spelling of 121334521 in words is "one hundred twenty-one million, three hundred thirty-four thousand, five hundred twenty-one".