1002120112001 has 4 divisors (see below), whose sum is σ = 1002231307092. Its totient is φ = 1002008916912.

The previous prime is 1002120111997. The next prime is 1002120112013. The reversal of 1002120112001 is 1002110212001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 757143619600 + 244976492401 = 870140^2 + 494951^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002120112001 - 2² = 1002120111997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1002120112031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55584026 + ... + 55602051.

It is an arithmetic number, because the mean of its divisors is an integer number (250557826773).

Almost surely, 2^{1002120112001} is an apocalyptic number.

It is an amenable number.

1002120112001 is a deficient number, since it is larger than the sum of its proper divisors (111195091).

1002120112001 is an equidigital number, since it uses as much as digits as its factorization.

1002120112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111195090.

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

Adding to 1002120112001 its reverse (1002110212001), we get a palindrome (2004230324002).

The spelling of 1002120112001 in words is "one trillion, two billion, one hundred twenty million, one hundred twelve thousand, one".