220211200021021 has 12 divisors (see below), whose sum is σ = 242050705578556. Its totient is φ = 200191687153920.

The previous prime is 220211200020997. The next prime is 220211200021031. The reversal of 220211200021021 is 120120002112022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44457556522500 + 175753643498521 = 6667650^2 + 13257211^2 .

It is not a de Polignac number, because 220211200021021 - 2¹⁷ = 220211199889949 is a prime.

It is a super-2 number, since 2×220211200021021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220211200020986 and 220211200021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220211200021031) 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, 116692045 + ... + 118564141.

Almost surely, 2^{220211200021021} is an apocalyptic number.

It is an amenable number.

220211200021021 is a deficient number, since it is larger than the sum of its proper divisors (21839505557535).

220211200021021 is a wasteful number, since it uses less digits than its factorization.

220211200021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844252 (or 2844241 counting only the distinct ones).

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

Adding to 220211200021021 its reverse (120120002112022), we get a palindrome (340331202133043).

The spelling of 220211200021021 in words is "two hundred twenty trillion, two hundred eleven billion, two hundred million, twenty-one thousand, twenty-one".