100120020001 has 2 divisors, whose sum is σ = 100120020002. Its totient is φ = 100120020000.

The previous prime is 100120019959. The next prime is 100120020061. The reversal of 100120020001 is 100020021001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87249344400 + 12870675601 = 295380^2 + 113449^2 .

It is a cyclic number.

It is not a de Polignac number, because 100120020001 - 2⁷ = 100120019873 is a prime.

It is not a weakly prime, because it can be changed into another prime (100120020061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060010000 + 50060010001.

It is an arithmetic number, because the mean of its divisors is an integer number (50060010001).

Almost surely, 2^100120020001 is an apocalyptic number.

It is an amenable number.

100120020001 is a deficient number, since it is larger than the sum of its proper divisors (1).

100120020001 is an equidigital number, since it uses as much as digits as its factorization.

100120020001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 100120020001 its reverse (100020021001), we get a palindrome (200140041002).

It can be divided in two parts, 1001200 and 20001, that added together give a palindrome (1021201).

The spelling of 100120020001 in words is "one hundred billion, one hundred twenty million, twenty thousand, one".