121350923681 has 8 divisors (see below), whose sum is σ = 131035978920. Its totient is φ = 111715921152.

The previous prime is 121350923653. The next prime is 121350923711. The reversal of 121350923681 is 186329053121.

It can be written as a sum of positive squares in 4 ways, for example, as 2470090000 + 118880833681 = 49700^2 + 344791^2 .

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 121350923681 - 2²² = 121346729377 is a prime.

It is a super-2 number, since 2×121350923681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121350923611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12508136 + ... + 12517833.

It is an arithmetic number, because the mean of its divisors is an integer number (16379497365).

Almost surely, 2^121350923681 is an apocalyptic number.

It is an amenable number.

121350923681 is a deficient number, since it is larger than the sum of its proper divisors (9685055239).

121350923681 is a wasteful number, since it uses less digits than its factorization.

121350923681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25026355.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 121350923681 in words is "one hundred twenty-one billion, three hundred fifty million, nine hundred twenty-three thousand, six hundred eighty-one".