120001221211111 has 16 divisors (see below), whose sum is σ = 124304996116224. Its totient is φ = 115766985527424.

The previous prime is 120001221211087. The next prime is 120001221211127. The reversal of 120001221211111 is 111112122100021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120001221211111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120001221211211) 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, 8647230 + ... + 17741956.

It is an arithmetic number, because the mean of its divisors is an integer number (7769062257264).

Almost surely, 2^{120001221211111} is an apocalyptic number.

120001221211111 is a deficient number, since it is larger than the sum of its proper divisors (4303774905113).

120001221211111 is an equidigital number, since it uses as much as digits as its factorization.

120001221211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9098550.

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

Adding to 120001221211111 its reverse (111112122100021), we get a palindrome (231113343311132).

The spelling of 120001221211111 in words is "one hundred twenty trillion, one billion, two hundred twenty-one million, two hundred eleven thousand, one hundred eleven".