120211221111 has 16 divisors (see below), whose sum is σ = 161147750400. Its totient is φ = 79707894080.

The previous prime is 120211221089. The next prime is 120211221121. The reversal of 120211221111 is 111122112021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 120211221111 - 2⁹ = 120211220599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120211221121) 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, 4365715 + ... + 4393163.

It is an arithmetic number, because the mean of its divisors is an integer number (10071734400).

Almost surely, 2^120211221111 is an apocalyptic number.

120211221111 is a deficient number, since it is larger than the sum of its proper divisors (40936529289).

120211221111 is a wasteful number, since it uses less digits than its factorization.

120211221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35286.

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

Adding to 120211221111 its reverse (111122112021), we get a palindrome (231333333132).

The spelling of 120211221111 in words is "one hundred twenty billion, two hundred eleven million, two hundred twenty-one thousand, one hundred eleven".