102102000978449 has 2 divisors, whose sum is σ = 102102000978450. Its totient is φ = 102102000978448.

The previous prime is 102102000978379. The next prime is 102102000978457. The reversal of 102102000978449 is 944879000201201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87089359580224 + 15012641398225 = 9332168^2 + 3874615^2 .

It is a cyclic number.

It is not a de Polignac number, because 102102000978449 - 2¹² = 102102000974353 is a prime.

It is not a weakly prime, because it can be changed into another prime (102102000978049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51051000489224 + 51051000489225.

It is an arithmetic number, because the mean of its divisors is an integer number (51051000489225).

Almost surely, 2^{102102000978449} is an apocalyptic number.

It is an amenable number.

102102000978449 is a deficient number, since it is larger than the sum of its proper divisors (1).

102102000978449 is an equidigital number, since it uses as much as digits as its factorization.

102102000978449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 102102000978449 in words is "one hundred two trillion, one hundred two billion, nine hundred seventy-eight thousand, four hundred forty-nine".