1001020120957 has 2 divisors, whose sum is σ = 1001020120958. Its totient is φ = 1001020120956.

The previous prime is 1001020120951. The next prime is 1001020121021. The reversal of 1001020120957 is 7590210201001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 783426792996 + 217593327961 = 885114^2 + 466469^2 .

It is an emirp because it is prime and its reverse (7590210201001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1001020120957 - 2¹¹ = 1001020118909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001020120951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500510060478 + 500510060479.

It is an arithmetic number, because the mean of its divisors is an integer number (500510060479).

Almost surely, 2^{1001020120957} is an apocalyptic number.

It is an amenable number.

1001020120957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001020120957 is an equidigital number, since it uses as much as digits as its factorization.

1001020120957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 28.

Adding to 1001020120957 its reverse (7590210201001), we get a palindrome (8591230321958).

The spelling of 1001020120957 in words is "one trillion, one billion, twenty million, one hundred twenty thousand, nine hundred fifty-seven".