120111110021221 has 32 divisors (see below), whose sum is σ = 139132994457600. Its totient is φ = 102476377620480.

The previous prime is 120111110021213. The next prime is 120111110021233. The reversal of 120111110021221 is 122120011111021.

It is a cyclic number.

It is not a de Polignac number, because 120111110021221 - 2³ = 120111110021213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120111110021195 and 120111110021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120111110022221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306986965 + ... + 307377973.

It is an arithmetic number, because the mean of its divisors is an integer number (4347906076800).

Almost surely, 2^{120111110021221} is an apocalyptic number.

120111110021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120111110021221 is a deficient number, since it is larger than the sum of its proper divisors (19021884436379).

120111110021221 is a wasteful number, since it uses less digits than its factorization.

120111110021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395709.

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

Adding to 120111110021221 its reverse (122120011111021), we get a palindrome (242231121132242).

The spelling of 120111110021221 in words is "one hundred twenty trillion, one hundred eleven billion, one hundred ten million, twenty-one thousand, two hundred twenty-one".