2100220021121 has 4 divisors (see below), whose sum is σ = 2101047207600. Its totient is φ = 2099392834644.

The previous prime is 2100220021117. The next prime is 2100220021153. The reversal of 2100220021121 is 1211200220012.

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 2100220021121 - 2² = 2100220021117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100220021096 and 2100220021105.

It is not an unprimeable number, because it can be changed into a prime (2100220021721) 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, 413589431 + ... + 413594508.

It is an arithmetic number, because the mean of its divisors is an integer number (525261801900).

Almost surely, 2^{2100220021121} is an apocalyptic number.

It is an amenable number.

2100220021121 is a deficient number, since it is larger than the sum of its proper divisors (827186479).

2100220021121 is an equidigital number, since it uses as much as digits as its factorization.

2100220021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827186478.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2100220021121 its reverse (1211200220012), we get a palindrome (3311420241133).

The spelling of 2100220021121 in words is "two trillion, one hundred billion, two hundred twenty million, twenty-one thousand, one hundred twenty-one".