220211211112021 has 4 divisors (see below), whose sum is σ = 220212335333452. Its totient is φ = 220210086890592.

The previous prime is 220211211111917. The next prime is 220211211112031. The reversal of 220211211112021 is 120211112112022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81611096260996 + 138600114851025 = 9033886^2 + 11772855^2 .

It is a cyclic number.

It is not a de Polignac number, because 220211211112021 - 2¹¹ = 220211211109973 is a prime.

It is a super-2 number, since 2×220211211112021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220211211112021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220211211112031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561816846 + ... + 562208671.

It is an arithmetic number, because the mean of its divisors is an integer number (55053083833363).

Almost surely, 2^{220211211112021} is an apocalyptic number.

It is an amenable number.

220211211112021 is a deficient number, since it is larger than the sum of its proper divisors (1124221431).

220211211112021 is a wasteful number, since it uses less digits than its factorization.

220211211112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124221430.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 220211211112021 its reverse (120211112112022), we get a palindrome (340422323224043).

The spelling of 220211211112021 in words is "two hundred twenty trillion, two hundred eleven billion, two hundred eleven million, one hundred twelve thousand, twenty-one".