1021203123049 has 2 divisors, whose sum is σ = 1021203123050. Its totient is φ = 1021203123048.

The previous prime is 1021203123043. The next prime is 1021203123103. The reversal of 1021203123049 is 9403213021201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1018571433049 + 2631690000 = 1009243^2 + 51300^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021203123049 - 2³ = 1021203123041 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021203123041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510601561524 + 510601561525.

It is an arithmetic number, because the mean of its divisors is an integer number (510601561525).

Almost surely, 2^{1021203123049} is an apocalyptic number.

It is an amenable number.

1021203123049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021203123049 is an equidigital number, since it uses as much as digits as its factorization.

1021203123049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 1021203123049 in words is "one trillion, twenty-one billion, two hundred three million, one hundred twenty-three thousand, forty-nine".