120021221112111 has 48 divisors (see below), whose sum is σ = 189788018933760. Its totient is φ = 72485186247360.

The previous prime is 120021221112053. The next prime is 120021221112127. The reversal of 120021221112111 is 111211122120021.

It is a happy number.

120021221112111 is a `hidden beast` number, since 1 + 200 + 21 + 221 + 11 + 211 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-120021221112111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021221112151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45178521 + ... + 47761293.

It is an arithmetic number, because the mean of its divisors is an integer number (3953917061120).

Almost surely, 2^{120021221112111} is an apocalyptic number.

120021221112111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120021221112111 is a deficient number, since it is larger than the sum of its proper divisors (69766797821649).

120021221112111 is a wasteful number, since it uses less digits than its factorization.

120021221112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584436 (or 2584433 counting only the distinct ones).

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

Adding to 120021221112111 its reverse (111211122120021), we get a palindrome (231232343232132).

The spelling of 120021221112111 in words is "one hundred twenty trillion, twenty-one billion, two hundred twenty-one million, one hundred twelve thousand, one hundred eleven".