121321120314521 has 4 divisors (see below), whose sum is σ = 121321168906752. Its totient is φ = 121321071722292.

The previous prime is 121321120314497. The next prime is 121321120314593. The reversal of 121321120314521 is 125413021123121.

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 121321120314521 - 2³⁸ = 121046242407577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121321120304521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20335865 + ... + 25616198.

It is an arithmetic number, because the mean of its divisors is an integer number (30330292226688).

Almost surely, 2^{121321120314521} is an apocalyptic number.

It is an amenable number.

121321120314521 is a deficient number, since it is larger than the sum of its proper divisors (48592231).

121321120314521 is an equidigital number, since it uses as much as digits as its factorization.

121321120314521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48592230.

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 121321120314521 its reverse (125413021123121), we get a palindrome (246734141437642).

The spelling of 121321120314521 in words is "one hundred twenty-one trillion, three hundred twenty-one billion, one hundred twenty million, three hundred fourteen thousand, five hundred twenty-one".