121340343281 has 2 divisors, whose sum is σ = 121340343282. Its totient is φ = 121340343280.

The previous prime is 121340343263. The next prime is 121340343347. The reversal of 121340343281 is 182343043121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103271606881 + 18068736400 = 321359^2 + 134420^2 .

It is a cyclic number.

It is not a de Polignac number, because 121340343281 - 2²⁶ = 121273234417 is a prime.

It is a super-2 number, since 2×121340343281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121345343281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60670171640 + 60670171641.

It is an arithmetic number, because the mean of its divisors is an integer number (60670171641).

Almost surely, 2^121340343281 is an apocalyptic number.

It is an amenable number.

121340343281 is a deficient number, since it is larger than the sum of its proper divisors (1).

121340343281 is an equidigital number, since it uses as much as digits as its factorization.

121340343281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 121340343281 in words is "one hundred twenty-one billion, three hundred forty million, three hundred forty-three thousand, two hundred eighty-one".