1020121000949 has 2 divisors, whose sum is σ = 1020121000950. Its totient is φ = 1020121000948.

The previous prime is 1020121000939. The next prime is 1020121001027. The reversal of 1020121000949 is 9490001210201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 853763064049 + 166357936900 = 923993^2 + 407870^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020121000949 - 2²⁰ = 1020119952373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020121000939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510060500474 + 510060500475.

It is an arithmetic number, because the mean of its divisors is an integer number (510060500475).

Almost surely, 2^{1020121000949} is an apocalyptic number.

It is an amenable number.

1020121000949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020121000949 is an equidigital number, since it uses as much as digits as its factorization.

1020121000949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 1020121000949 in words is "one trillion, twenty billion, one hundred twenty-one million, nine hundred forty-nine", and thus it is an aban number.