111210220121211 has 12 divisors (see below), whose sum is σ = 160646454685288. Its totient is φ = 74135775947904.

The previous prime is 111210220121207. The next prime is 111210220121249. The reversal of 111210220121211 is 112121022012111.

It is a happy number.

111210220121211 is a `hidden beast` number, since 1 + 1 + 1 + 210 + 220 + 1 + 21 + 211 = 666.

It is not a de Polignac number, because 111210220121211 - 2² = 111210220121207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111210220131211) 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, 364072150 + ... + 364377483.

Almost surely, 2^{111210220121211} is an apocalyptic number.

111210220121211 is a deficient number, since it is larger than the sum of its proper divisors (49436234564077).

111210220121211 is a wasteful number, since it uses less digits than its factorization.

111210220121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728466602 (or 728466599 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111210220121211 its reverse (112121022012111), we get a palindrome (223331242133322).

The spelling of 111210220121211 in words is "one hundred eleven trillion, two hundred ten billion, two hundred twenty million, one hundred twenty-one thousand, two hundred eleven".