2121100122001 has 4 divisors (see below), whose sum is σ = 2424114425152. Its totient is φ = 1818085818852.

The previous prime is 2121100121977. The next prime is 2121100122041. The reversal of 2121100122001 is 1002210011212.

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 2121100122001 - 2⁵ = 2121100121969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121100122041) 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, 151507151565 + ... + 151507151578.

It is an arithmetic number, because the mean of its divisors is an integer number (606028606288).

Almost surely, 2^{2121100122001} is an apocalyptic number.

It is an amenable number.

2121100122001 is a deficient number, since it is larger than the sum of its proper divisors (303014303151).

2121100122001 is an equidigital number, since it uses as much as digits as its factorization.

2121100122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303014303150.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2121100122001 its reverse (1002210011212), we get a palindrome (3123310133213).

The spelling of 2121100122001 in words is "two trillion, one hundred twenty-one billion, one hundred million, one hundred twenty-two thousand, one".