1212221120211 has 12 divisors (see below), whose sum is σ = 1751114115088. Its totient is φ = 808088312304.

The previous prime is 1212221120203. The next prime is 1212221120251. The reversal of 1212221120211 is 1120211222121.

1212221120211 is a `hidden beast` number, since 1 + 212 + 221 + 1 + 20 + 211 = 666.

It is not a de Polignac number, because 1212221120211 - 2³ = 1212221120203 is a prime.

It is a super-2 number, since 2×1212221120211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212221120251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4795015 + ... + 5041488.

Almost surely, 2^{1212221120211} is an apocalyptic number.

1212221120211 is a deficient number, since it is larger than the sum of its proper divisors (538892994877).

1212221120211 is a wasteful number, since it uses less digits than its factorization.

1212221120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9850202 (or 9850199 counting only the distinct ones).

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

Adding to 1212221120211 its reverse (1120211222121), we get a palindrome (2332432342332).

The spelling of 1212221120211 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, one hundred twenty thousand, two hundred eleven".