1000120020901 has 2 divisors, whose sum is σ = 1000120020902. Its totient is φ = 1000120020900.

The previous prime is 1000120020883. The next prime is 1000120020931. The reversal of 1000120020901 is 1090200210001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 577639520676 + 422480500225 = 760026^2 + 649985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000120020901 - 2¹³ = 1000120012709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000120020931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500060010450 + 500060010451.

It is an arithmetic number, because the mean of its divisors is an integer number (500060010451).

Almost surely, 2^{1000120020901} is an apocalyptic number.

It is an amenable number.

1000120020901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000120020901 is an equidigital number, since it uses as much as digits as its factorization.

1000120020901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1000120020901 its reverse (1090200210001), we get a palindrome (2090320230902).

The spelling of 1000120020901 in words is "one trillion, one hundred twenty million, twenty thousand, nine hundred one".