120021120202121 has 4 divisors (see below), whose sum is σ = 120037541213700. Its totient is φ = 120004699190544.

The previous prime is 120021120202117. The next prime is 120021120202147. The reversal of 120021120202121 is 121202021120021.

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 42554277876496 + 77466842325625 = 6523364^2 + 8801525^2 .

It is a cyclic number.

It is not a de Polignac number, because 120021120202121 - 2² = 120021120202117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120021120202121.

It is not an unprimeable number, because it can be changed into a prime (120021170202121) 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, 8210494826 + ... + 8210509443.

It is an arithmetic number, because the mean of its divisors is an integer number (30009385303425).

Almost surely, 2^{120021120202121} is an apocalyptic number.

It is an amenable number.

120021120202121 is a deficient number, since it is larger than the sum of its proper divisors (16421011579).

120021120202121 is an equidigital number, since it uses as much as digits as its factorization.

120021120202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16421011578.

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

Adding to 120021120202121 its reverse (121202021120021), we get a palindrome (241223141322142).

The spelling of 120021120202121 in words is "one hundred twenty trillion, twenty-one billion, one hundred twenty million, two hundred two thousand, one hundred twenty-one".