2121130020001 has 4 divisors (see below), whose sum is σ = 2134640402452. Its totient is φ = 2107619637552.

The previous prime is 2121130019999. The next prime is 2121130020011. The reversal of 2121130020001 is 1000200311212.

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 258014218401 + 1863115801600 = 507951^2 + 1364960^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121130020001 - 2¹ = 2121130019999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121130020011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6755190990 + ... + 6755191303.

It is an arithmetic number, because the mean of its divisors is an integer number (533660100613).

Almost surely, 2^{2121130020001} is an apocalyptic number.

It is an amenable number.

2121130020001 is a deficient number, since it is larger than the sum of its proper divisors (13510382451).

2121130020001 is a wasteful number, since it uses less digits than its factorization.

2121130020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13510382450.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 2121130020001 its reverse (1000200311212), we get a palindrome (3121330331213).

The spelling of 2121130020001 in words is "two trillion, one hundred twenty-one billion, one hundred thirty million, twenty thousand, one".