2111202020221 has 16 divisors (see below), whose sum is σ = 2422482289920. Its totient is φ = 1802343444480.

The previous prime is 2111202020201. The next prime is 2111202020267. The reversal of 2111202020221 is 1220202021112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2111202020221 - 2²⁵ = 2111168465789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2111202020195 and 2111202020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111202020201) 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, 15874720 + ... + 16007158.

It is an arithmetic number, because the mean of its divisors is an integer number (151405143120).

Almost surely, 2^{2111202020221} is an apocalyptic number.

It is an amenable number.

2111202020221 is a deficient number, since it is larger than the sum of its proper divisors (311280269699).

2111202020221 is a wasteful number, since it uses less digits than its factorization.

2111202020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141564.

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

Adding to 2111202020221 its reverse (1220202021112), we get a palindrome (3331404041333).

The spelling of 2111202020221 in words is "two trillion, one hundred eleven billion, two hundred two million, twenty thousand, two hundred twenty-one".