120212232121 has 4 divisors (see below), whose sum is σ = 120472996644. Its totient is φ = 119951467600.

The previous prime is 120212232113. The next prime is 120212232131. The reversal of 120212232121 is 121232212021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121232212021 = 5861 ⋅20684561.

It can be written as a sum of positive squares in 2 ways, for example, as 42685626025 + 77526606096 = 206605^2 + 278436^2 .

It is a cyclic number.

It is not a de Polignac number, because 120212232121 - 2³ = 120212232113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120212232131) 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, 130381570 + ... + 130382491.

It is an arithmetic number, because the mean of its divisors is an integer number (30118249161).

Almost surely, 2^120212232121 is an apocalyptic number.

It is an amenable number.

120212232121 is a deficient number, since it is larger than the sum of its proper divisors (260764523).

120212232121 is an equidigital number, since it uses as much as digits as its factorization.

120212232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260764522.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 120212232121 its reverse (121232212021), we get a palindrome (241444444142).

The spelling of 120212232121 in words is "one hundred twenty billion, two hundred twelve million, two hundred thirty-two thousand, one hundred twenty-one".