120111212212221 has 32 divisors (see below), whose sum is σ = 163676204402688. Its totient is φ = 78312708714240.

The previous prime is 120111212212163. The next prime is 120111212212231. The reversal of 120111212212221 is 122212212111021.

It is not a de Polignac number, because 120111212212221 - 2⁷ = 120111212212093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120111212212231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1380370606 + ... + 1380457616.

It is an arithmetic number, because the mean of its divisors is an integer number (5114881387584).

Almost surely, 2^{120111212212221} is an apocalyptic number.

It is an amenable number.

120111212212221 is a deficient number, since it is larger than the sum of its proper divisors (43564992190467).

120111212212221 is a wasteful number, since it uses less digits than its factorization.

120111212212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94161.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 120111212212221 its reverse (122212212111021), we get a palindrome (242323424323242).

The spelling of 120111212212221 in words is "one hundred twenty trillion, one hundred eleven billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty-one".