2221100000021 has 24 divisors (see below), whose sum is σ = 2588684676480. Its totient is φ = 1900151635200.

The previous prime is 2221099999897. The next prime is 2221100000029. The reversal of 2221100000021 is 1200000011222.

It is a happy number.

It is not a de Polignac number, because 2221100000021 - 2¹⁴ = 2221099983637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221099999948 and 2221100000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221100000029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56180741 + ... + 56220261.

It is an arithmetic number, because the mean of its divisors is an integer number (107861861520).

Almost surely, 2^{2221100000021} is an apocalyptic number.

It is an amenable number.

2221100000021 is a deficient number, since it is larger than the sum of its proper divisors (367584676459).

2221100000021 is a wasteful number, since it uses less digits than its factorization.

2221100000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41705 (or 41698 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2221100000021 its reverse (1200000011222), we get a palindrome (3421100011243).

The spelling of 2221100000021 in words is "two trillion, two hundred twenty-one billion, one hundred million, twenty-one", and thus it is an aban number.