2220101212221 has 40 divisors (see below), whose sum is σ = 3355870023000. Its totient is φ = 1462531593600.

The previous prime is 2220101212193. The next prime is 2220101212253. The reversal of 2220101212221 is 1222121010222.

It is a happy number.

2220101212221 is a `hidden beast` number, since 2 + 220 + 10 + 1 + 212 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1420661367225 + 799439844996 = 1191915^2 + 894114^2 .

It is not a de Polignac number, because 2220101212221 - 2¹⁰ = 2220101211197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2220101212194 and 2220101212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220101212261) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3897555 + ... + 4430703.

It is an arithmetic number, because the mean of its divisors is an integer number (83896750575).

Almost surely, 2^{2220101212221} is an apocalyptic number.

It is an amenable number.

2220101212221 is a deficient number, since it is larger than the sum of its proper divisors (1135768810779).

2220101212221 is a wasteful number, since it uses less digits than its factorization.

2220101212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533771 (or 533762 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2220101212221 its reverse (1222121010222), we get a palindrome (3442222222443).

The spelling of 2220101212221 in words is "two trillion, two hundred twenty billion, one hundred one million, two hundred twelve thousand, two hundred twenty-one".