120111020221221 has 6 divisors (see below), whose sum is σ = 173493695875110. Its totient is φ = 80074013480808.

The previous prime is 120111020221211. The next prime is 120111020221259. The reversal of 120111020221221 is 122122020111021.

120111020221221 is a `hidden beast` number, since 1 + 201 + 1 + 1 + 0 + 20 + 221 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 120077983160100 + 33037061121 = 10958010^2 + 181761^2 .

It is not a de Polignac number, because 120111020221221 - 2¹⁰ = 120111020220197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120111020221194 and 120111020221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120111020221211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6672834456726 + ... + 6672834456743.

It is an arithmetic number, because the mean of its divisors is an integer number (28915615979185).

Almost surely, 2^{120111020221221} is an apocalyptic number.

It is an amenable number.

120111020221221 is a deficient number, since it is larger than the sum of its proper divisors (53382675653889).

120111020221221 is a wasteful number, since it uses less digits than its factorization.

120111020221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13345668913475 (or 13345668913472 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 120111020221221 its reverse (122122020111021), we get a palindrome (242233040332242).

The spelling of 120111020221221 in words is "one hundred twenty trillion, one hundred eleven billion, twenty million, two hundred twenty-one thousand, two hundred twenty-one".