120231213121 has 4 divisors (see below), whose sum is σ = 120407247792. Its totient is φ = 120055178452.

The previous prime is 120231213107. The next prime is 120231213131. The reversal of 120231213121 is 121312132021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121312132021 = 461 ⋅263149961.

It is a cyclic number.

It is not a de Polignac number, because 120231213121 - 2¹⁵ = 120231180353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120231213131) 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, 88016311 + ... + 88017676.

It is an arithmetic number, because the mean of its divisors is an integer number (30101811948).

Almost surely, 2^120231213121 is an apocalyptic number.

It is an amenable number.

120231213121 is a deficient number, since it is larger than the sum of its proper divisors (176034671).

120231213121 is an equidigital number, since it uses as much as digits as its factorization.

120231213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176034670.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 120231213121 its reverse (121312132021), we get a palindrome (241543345142).

The spelling of 120231213121 in words is "one hundred twenty billion, two hundred thirty-one million, two hundred thirteen thousand, one hundred twenty-one".