1020121020973 has 2 divisors, whose sum is σ = 1020121020974. Its totient is φ = 1020121020972.

The previous prime is 1020121020967. The next prime is 1020121021019. The reversal of 1020121020973 is 3790201210201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 969519868164 + 50601152809 = 984642^2 + 224947^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020121020973 - 2²¹ = 1020118923821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020121029973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510060510486 + 510060510487.

It is an arithmetic number, because the mean of its divisors is an integer number (510060510487).

Almost surely, 2^{1020121020973} is an apocalyptic number.

It is an amenable number.

1020121020973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020121020973 is an equidigital number, since it uses as much as digits as its factorization.

1020121020973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The spelling of 1020121020973 in words is "one trillion, twenty billion, one hundred twenty-one million, twenty thousand, nine hundred seventy-three".