2206643102021 has 16 divisors (see below), whose sum is σ = 2418897297600. Its totient is φ = 2003661881088.

The previous prime is 2206643101997. The next prime is 2206643102057. The reversal of 2206643102021 is 1202013466022.

It is a cyclic number.

It is not a de Polignac number, because 2206643102021 - 2³⁸ = 1931765195077 is a prime.

It is a super-2 number, since 2×2206643102021² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2206643102921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1111811 + ... + 2376848.

It is an arithmetic number, because the mean of its divisors is an integer number (151181081100).

Almost surely, 2^{2206643102021} is an apocalyptic number.

It is an amenable number.

2206643102021 is a deficient number, since it is larger than the sum of its proper divisors (212254195579).

2206643102021 is a wasteful number, since it uses less digits than its factorization.

2206643102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3489988.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 2206643102021 its reverse (1202013466022), we get a palindrome (3408656568043).

The spelling of 2206643102021 in words is "two trillion, two hundred six billion, six hundred forty-three million, one hundred two thousand, twenty-one".