2102021121001 has 4 divisors (see below), whose sum is σ = 2212653811600. Its totient is φ = 1991388430404.

The previous prime is 2102021120929. The next prime is 2102021121023. The reversal of 2102021121001 is 1001211202012.

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 2102021121001 - 2²⁷ = 2101886903273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102021121041) 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, 55316345271 + ... + 55316345308.

It is an arithmetic number, because the mean of its divisors is an integer number (553163452900).

Almost surely, 2^{2102021121001} is an apocalyptic number.

It is an amenable number.

2102021121001 is a deficient number, since it is larger than the sum of its proper divisors (110632690599).

2102021121001 is a wasteful number, since it uses less digits than its factorization.

2102021121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110632690598.

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

Adding to 2102021121001 its reverse (1001211202012), we get a palindrome (3103232323013).

The spelling of 2102021121001 in words is "two trillion, one hundred two billion, twenty-one million, one hundred twenty-one thousand, one".