20011202001001 has 2 divisors, whose sum is σ = 20011202001002. Its totient is φ = 20011202001000.

The previous prime is 20011202000957. The next prime is 20011202001017. The reversal of 20011202001001 is 10010020211002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18289991822400 + 1721210178601 = 4276680^2 + 1311949^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011202001001 - 2³⁵ = 19976842262633 is a prime.

It is not a weakly prime, because it can be changed into another prime (20011202001061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005601000500 + 10005601000501.

It is an arithmetic number, because the mean of its divisors is an integer number (10005601000501).

Almost surely, 2^{20011202001001} is an apocalyptic number.

It is an amenable number.

20011202001001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011202001001 is an equidigital number, since it uses as much as digits as its factorization.

20011202001001 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 10.

Adding to 20011202001001 its reverse (10010020211002), we get a palindrome (30021222212003).

The spelling of 20011202001001 in words is "twenty trillion, eleven billion, two hundred two million, one thousand, one".