120121120213 has 4 divisors (see below), whose sum is σ = 120121859628. Its totient is φ = 120120380800.

The previous prime is 120121120201. The next prime is 120121120241. The reversal of 120121120213 is 312021121021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 312021121021 = 2857 ⋅109212853.

It can be written as a sum of positive squares in 2 ways, for example, as 109413423729 + 10707696484 = 330777^2 + 103478^2 .

It is a cyclic number.

It is not a de Polignac number, because 120121120213 - 2¹⁷ = 120120989141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121120253) 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, 8188 + ... + 490213.

It is an arithmetic number, because the mean of its divisors is an integer number (30030464907).

Almost surely, 2^120121120213 is an apocalyptic number.

It is an amenable number.

120121120213 is a deficient number, since it is larger than the sum of its proper divisors (739415).

120121120213 is an equidigital number, since it uses as much as digits as its factorization.

120121120213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739414.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 120121120213 its reverse (312021121021), we get a palindrome (432142241234).

The spelling of 120121120213 in words is "one hundred twenty billion, one hundred twenty-one million, one hundred twenty thousand, two hundred thirteen".