120112421221 has 4 divisors (see below), whose sum is σ = 129351838252. Its totient is φ = 110873004192.

The previous prime is 120112421147. The next prime is 120112421237. The reversal of 120112421221 is 122124211021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122124211021 = 55639 ⋅2194939.

It can be written as a sum of positive squares in 2 ways, for example, as 6466572225 + 113645848996 = 80415^2 + 337114^2 .

It is a cyclic number.

It is not a de Polignac number, because 120112421221 - 2⁹ = 120112420709 is a prime.

It is a super-2 number, since 2×120112421221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120112421021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4619708496 + ... + 4619708521.

It is an arithmetic number, because the mean of its divisors is an integer number (32337959563).

Almost surely, 2^120112421221 is an apocalyptic number.

It is an amenable number.

120112421221 is a deficient number, since it is larger than the sum of its proper divisors (9239417031).

120112421221 is an equidigital number, since it uses as much as digits as its factorization.

120112421221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9239417030.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 120112421221 its reverse (122124211021), we get a palindrome (242236632242).

The spelling of 120112421221 in words is "one hundred twenty billion, one hundred twelve million, four hundred twenty-one thousand, two hundred twenty-one".