121261501321 has 8 divisors (see below), whose sum is σ = 124128889344. Its totient is φ = 118406086560.

The previous prime is 121261501267. The next prime is 121261501351. The reversal of 121261501321 is 123105162121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121261501321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121261501351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2972820 + ... + 3013333.

It is an arithmetic number, because the mean of its divisors is an integer number (15516111168).

Almost surely, 2^121261501321 is an apocalyptic number.

It is an amenable number.

121261501321 is a deficient number, since it is larger than the sum of its proper divisors (2867388023).

121261501321 is an equidigital number, since it uses as much as digits as its factorization.

121261501321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5986631.

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 121261501321 its reverse (123105162121), we get a palindrome (244366663442).

The spelling of 121261501321 in words is "one hundred twenty-one billion, two hundred sixty-one million, five hundred one thousand, three hundred twenty-one".