120212021121121 has 16 divisors (see below), whose sum is σ = 126652620794560. Its totient is φ = 113782803122880.

The previous prime is 120212021121091. The next prime is 120212021121163. The reversal of 120212021121121 is 121121120212021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 120212021121121 - 2¹⁵ = 120212021088353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (120212021121421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268580206 + ... + 269027416.

It is an arithmetic number, because the mean of its divisors is an integer number (7915788799660).

Almost surely, 2^{120212021121121} is an apocalyptic number.

It is an amenable number.

120212021121121 is a deficient number, since it is larger than the sum of its proper divisors (6440599673439).

120212021121121 is a wasteful number, since it uses less digits than its factorization.

120212021121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459904.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 120212021121121 its reverse (121121120212021), we get a palindrome (241333141333142).

The spelling of 120212021121121 in words is "one hundred twenty trillion, two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".