120221221121 has 4 divisors (see below), whose sum is σ = 124366780500. Its totient is φ = 116075661744.

The previous prime is 120221221097. The next prime is 120221221157. The reversal of 120221221121 is 121122122021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75440312896 + 44780908225 = 274664^2 + 211615^2 .

It is a cyclic number.

It is not a de Polignac number, because 120221221121 - 2²⁶ = 120154112257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 120221221121.

It is not an unprimeable number, because it can be changed into a prime (120221221171) 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, 2072779646 + ... + 2072779703.

It is an arithmetic number, because the mean of its divisors is an integer number (31091695125).

Almost surely, 2^120221221121 is an apocalyptic number.

It is an amenable number.

120221221121 is a deficient number, since it is larger than the sum of its proper divisors (4145559379).

120221221121 is an equidigital number, since it uses as much as digits as its factorization.

120221221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4145559378.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 120221221121 its reverse (121122122021), we get a palindrome (241343343142).

The spelling of 120221221121 in words is "one hundred twenty billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".