121328052581 has 8 divisors (see below), whose sum is σ = 123437692224. Its totient is φ = 119229546240.

The previous prime is 121328052577. The next prime is 121328052613. The reversal of 121328052581 is 185250823121.

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 121328052581 - 2² = 121328052577 is a prime.

It is a super-2 number, since 2×121328052581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121328052511) 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, 2761340 + ... + 2804933.

It is an arithmetic number, because the mean of its divisors is an integer number (15429711528).

Almost surely, 2^121328052581 is an apocalyptic number.

It is an amenable number.

121328052581 is a deficient number, since it is larger than the sum of its proper divisors (2109639643).

121328052581 is an equidigital number, since it uses as much as digits as its factorization.

121328052581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5566651.

The product of its (nonzero) digits is 38400, while the sum is 38.

The spelling of 121328052581 in words is "one hundred twenty-one billion, three hundred twenty-eight million, fifty-two thousand, five hundred eighty-one".