121098643 has 2 divisors, whose sum is σ = 121098644. Its totient is φ = 121098642.

The previous prime is 121098631. The next prime is 121098661. The reversal of 121098643 is 346890121.

It is a weak prime.

It is an emirp because it is prime and its reverse (346890121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121098643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121098599 and 121098608.

It is not a weakly prime, because it can be changed into another prime (121098683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60549321 + 60549322.

It is an arithmetic number, because the mean of its divisors is an integer number (60549322).

Almost surely, 2^121098643 is an apocalyptic number.

121098643 is a deficient number, since it is larger than the sum of its proper divisors (1).

121098643 is an equidigital number, since it uses as much as digits as its factorization.

121098643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 121098643 is about 11004.4828592715. The cubic root of 121098643 is about 494.7431146777.

The spelling of 121098643 in words is "one hundred twenty-one million, ninety-eight thousand, six hundred forty-three".