121377331243201 has 16 divisors (see below), whose sum is σ = 133880617248768. Its totient is φ = 109124427484800.

The previous prime is 121377331243187. The next prime is 121377331243279. The reversal of 121377331243201 is 102342133773121.

It is a cyclic number.

It is not a de Polignac number, because 121377331243201 - 2⁹ = 121377331242689 is a prime.

It is a super-2 number, since 2×121377331243201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121377331247201) 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 15 ways as a sum of consecutive naturals, for example, 138355510 + ... + 139230031.

It is an arithmetic number, because the mean of its divisors is an integer number (8367538578048).

Almost surely, 2^{121377331243201} is an apocalyptic number.

121377331243201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121377331243201 is a deficient number, since it is larger than the sum of its proper divisors (12503286005567).

121377331243201 is a wasteful number, since it uses less digits than its factorization.

121377331243201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277585992.

The product of its (nonzero) digits is 127008, while the sum is 40.

The spelling of 121377331243201 in words is "one hundred twenty-one trillion, three hundred seventy-seven billion, three hundred thirty-one million, two hundred forty-three thousand, two hundred one".