120211111221 has 16 divisors (see below), whose sum is σ = 160686858240. Its totient is φ = 79938131760.

The previous prime is 120211111157. The next prime is 120211111271. The reversal of 120211111221 is 122111112021.

It is a happy number.

It is not a de Polignac number, because 120211111221 - 2⁶ = 120211111157 is a prime.

It is a super-2 number, since 2×120211111221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 120211111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120211111271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11268336 + ... + 11278998.

It is an arithmetic number, because the mean of its divisors is an integer number (10042928640).

Almost surely, 2^120211111221 is an apocalyptic number.

It is an amenable number.

120211111221 is a deficient number, since it is larger than the sum of its proper divisors (40475747019).

120211111221 is a wasteful number, since it uses less digits than its factorization.

120211111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19816.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 120211111221 its reverse (122111112021), we get a palindrome (242322223242).

The spelling of 120211111221 in words is "one hundred twenty billion, two hundred eleven million, one hundred eleven thousand, two hundred twenty-one".