2121201100001 has 4 divisors (see below), whose sum is σ = 2151077171904. Its totient is φ = 2091325028100.

The previous prime is 2121201099949. The next prime is 2121201100013. The reversal of 2121201100001 is 1000011021212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2121201100001 - 2⁶ = 2121201099937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121201100801) 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, 14938035845 + ... + 14938035986.

It is an arithmetic number, because the mean of its divisors is an integer number (537769292976).

Almost surely, 2^{2121201100001} is an apocalyptic number.

It is an amenable number.

2121201100001 is a deficient number, since it is larger than the sum of its proper divisors (29876071903).

2121201100001 is an equidigital number, since it uses as much as digits as its factorization.

2121201100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29876071902.

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

Adding to 2121201100001 its reverse (1000011021212), we get a palindrome (3121212121213).

The spelling of 2121201100001 in words is "two trillion, one hundred twenty-one billion, two hundred one million, one hundred thousand, one".