121978370783 has 2 divisors, whose sum is σ = 121978370784. Its totient is φ = 121978370782.

The previous prime is 121978370747. The next prime is 121978370791. The reversal of 121978370783 is 387073879121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121978370783 - 2¹⁶ = 121978305247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121978370713) 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 as a sum of consecutive naturals, namely, 60989185391 + 60989185392.

It is an arithmetic number, because the mean of its divisors is an integer number (60989185392).

Almost surely, 2^121978370783 is an apocalyptic number.

121978370783 is a deficient number, since it is larger than the sum of its proper divisors (1).

121978370783 is an equidigital number, since it uses as much as digits as its factorization.

121978370783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3556224, while the sum is 56.

The spelling of 121978370783 in words is "one hundred twenty-one billion, nine hundred seventy-eight million, three hundred seventy thousand, seven hundred eighty-three".