1021021002149 has 2 divisors, whose sum is σ = 1021021002150. Its totient is φ = 1021021002148.

The previous prime is 1021021002091. The next prime is 1021021002223. The reversal of 1021021002149 is 9412001201201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 798553129924 + 222467872225 = 893618^2 + 471665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021021002149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021021002049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510510501074 + 510510501075.

It is an arithmetic number, because the mean of its divisors is an integer number (510510501075).

Almost surely, 2^{1021021002149} is an apocalyptic number.

It is an amenable number.

1021021002149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021021002149 is an equidigital number, since it uses as much as digits as its factorization.

1021021002149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 1021021002149 in words is "one trillion, twenty-one billion, twenty-one million, two thousand, one hundred forty-nine".