120201220121 has 4 divisors (see below), whose sum is σ = 120206302644. Its totient is φ = 120196137600.

The previous prime is 120201220091. The next prime is 120201220129. The reversal of 120201220121 is 121022102021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121022102021 = 3511 ⋅34469411.

It can be written as a sum of positive squares in 2 ways, for example, as 75570010000 + 44631210121 = 274900^2 + 211261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120201220121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120201220096 and 120201220105.

It is not an unprimeable number, because it can be changed into a prime (120201220129) 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, 2505620 + ... + 2553141.

It is an arithmetic number, because the mean of its divisors is an integer number (30051575661).

Almost surely, 2^120201220121 is an apocalyptic number.

It is an amenable number.

120201220121 is a deficient number, since it is larger than the sum of its proper divisors (5082523).

120201220121 is an equidigital number, since it uses as much as digits as its factorization.

120201220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5082522.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 120201220121 its reverse (121022102021), we get a palindrome (241223322142).

The spelling of 120201220121 in words is "one hundred twenty billion, two hundred one million, two hundred twenty thousand, one hundred twenty-one".