2211121012221 has 32 divisors (see below), whose sum is σ = 3573865549440. Its totient is φ = 1339947100800.

The previous prime is 2211121012189. The next prime is 2211121012237. The reversal of 2211121012221 is 1222101211122.

2211121012221 is a `hidden beast` number, since 221 + 1 + 1 + 210 + 12 + 221 = 666.

It is not a de Polignac number, because 2211121012221 - 2⁵ = 2211121012189 is a prime.

It is a super-2 number, since 2×2211121012221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2211121012194 and 2211121012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211121012241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2856681 + ... + 3547233.

It is an arithmetic number, because the mean of its divisors is an integer number (111683298420).

Almost surely, 2^{2211121012221} is an apocalyptic number.

It is an amenable number.

2211121012221 is a deficient number, since it is larger than the sum of its proper divisors (1362744537219).

2211121012221 is a wasteful number, since it uses less digits than its factorization.

2211121012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701354 (or 701348 counting only the distinct ones).

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

Adding to 2211121012221 its reverse (1222101211122), we get a palindrome (3433222223343).

The spelling of 2211121012221 in words is "two trillion, two hundred eleven billion, one hundred twenty-one million, twelve thousand, two hundred twenty-one".