2100022101021 has 16 divisors (see below), whose sum is σ = 3016929465536. Its totient is φ = 1291672814976.

The previous prime is 2100022101017. The next prime is 2100022101077. The reversal of 2100022101021 is 1201012200012.

It is not a de Polignac number, because 2100022101021 - 2² = 2100022101017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100022100988 and 2100022101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100022101421) 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, 13431235 + ... + 13586688.

It is an arithmetic number, because the mean of its divisors is an integer number (188558091596).

Almost surely, 2^{2100022101021} is an apocalyptic number.

It is an amenable number.

2100022101021 is a deficient number, since it is larger than the sum of its proper divisors (916907364515).

2100022101021 is a wasteful number, since it uses less digits than its factorization.

2100022101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27019932.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2100022101021 its reverse (1201012200012), we get a palindrome (3301034301033).

The spelling of 2100022101021 in words is "two trillion, one hundred billion, twenty-two million, one hundred one thousand, twenty-one".