100120121002001 has 2 divisors, whose sum is σ = 100120121002002. Its totient is φ = 100120121002000.

The previous prime is 100120121001997. The next prime is 100120121002039. The reversal of 100120121002001 is 100200121021001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72205551838225 + 27914569163776 = 8497385^2 + 5283424^2 .

It is a cyclic number.

It is not a de Polignac number, because 100120121002001 - 2² = 100120121001997 is a prime.

It is not a weakly prime, because it can be changed into another prime (100120121002061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060060501000 + 50060060501001.

It is an arithmetic number, because the mean of its divisors is an integer number (50060060501001).

Almost surely, 2^{100120121002001} is an apocalyptic number.

It is an amenable number.

100120121002001 is a deficient number, since it is larger than the sum of its proper divisors (1).

100120121002001 is an equidigital number, since it uses as much as digits as its factorization.

100120121002001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100120121002001 its reverse (100200121021001), we get a palindrome (200320242023002).

The spelling of 100120121002001 in words is "one hundred trillion, one hundred twenty billion, one hundred twenty-one million, two thousand, one".