2100211222021 has 16 divisors (see below), whose sum is σ = 2308755312000. Its totient is φ = 1894627979200.

The previous prime is 2100211222019. The next prime is 2100211222033. The reversal of 2100211222021 is 1202221120012.

It is a happy number.

It is not a de Polignac number, because 2100211222021 - 2¹ = 2100211222019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100211221986 and 2100211222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100211222001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1068375 + ... + 2311243.

It is an arithmetic number, because the mean of its divisors is an integer number (144297207000).

Almost surely, 2^{2100211222021} is an apocalyptic number.

It is an amenable number.

2100211222021 is a deficient number, since it is larger than the sum of its proper divisors (208544089979).

2100211222021 is a wasteful number, since it uses less digits than its factorization.

2100211222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244060.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2100211222021 its reverse (1202221120012), we get a palindrome (3302432342033).

It can be divided in two parts, 2100211 and 222021, that added together give a palindrome (2322232).

The spelling of 2100211222021 in words is "two trillion, one hundred billion, two hundred eleven million, two hundred twenty-two thousand, twenty-one".