220211121120021 has 12 divisors (see below), whose sum is σ = 318778753992972. Its totient is φ = 146486172470976.

The previous prime is 220211121119989. The next prime is 220211121120049. The reversal of 220211121120021 is 120021121112022.

220211121120021 is a `hidden beast` number, since 2 + 20 + 211 + 1 + 211 + 200 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 121845170722500 + 98365950397521 = 11038350^2 + 9917961^2 .

It is not a de Polignac number, because 220211121120021 - 2⁵ = 220211121119989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220211121119976 and 220211121120003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220211121120071) 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 11 ways as a sum of consecutive naturals, for example, 26770129746 + ... + 26770137971.

It is an arithmetic number, because the mean of its divisors is an integer number (26564896166081).

Almost surely, 2^{220211121120021} is an apocalyptic number.

It is an amenable number.

220211121120021 is a deficient number, since it is larger than the sum of its proper divisors (98567632872951).

220211121120021 is a wasteful number, since it uses less digits than its factorization.

220211121120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53540268180 (or 53540268177 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 220211121120021 its reverse (120021121112022), we get a palindrome (340232242232043).

The spelling of 220211121120021 in words is "two hundred twenty trillion, two hundred eleven billion, one hundred twenty-one million, one hundred twenty thousand, twenty-one".