10203121219979 has 2 divisors, whose sum is σ = 10203121219980. Its totient is φ = 10203121219978.

The previous prime is 10203121219937. The next prime is 10203121220107. The reversal of 10203121219979 is 97991212130201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10203121219979 is a prime.

It is not a weakly prime, because it can be changed into another prime (10203121213979) 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, 5101560609989 + 5101560609990.

It is an arithmetic number, because the mean of its divisors is an integer number (5101560609990).

Almost surely, 2^{10203121219979} is an apocalyptic number.

10203121219979 is a deficient number, since it is larger than the sum of its proper divisors (1).

10203121219979 is an equidigital number, since it uses as much as digits as its factorization.

10203121219979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 47.

The spelling of 10203121219979 in words is "ten trillion, two hundred three billion, one hundred twenty-one million, two hundred nineteen thousand, nine hundred seventy-nine".