120121221202021 has 8 divisors (see below), whose sum is σ = 133534260790784. Its totient is φ = 107304316706160.

The previous prime is 120121221201973. The next prime is 120121221202067. The reversal of 120121221202021 is 120202122121021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120121221202021 - 2³⁷ = 119983782248549 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 120121221202021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121221202121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149033772801 + ... + 149033773606.

It is an arithmetic number, because the mean of its divisors is an integer number (16691782598848).

Almost surely, 2^{120121221202021} is an apocalyptic number.

It is an amenable number.

120121221202021 is a deficient number, since it is larger than the sum of its proper divisors (13413039588763).

120121221202021 is a wasteful number, since it uses less digits than its factorization.

120121221202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298067546451.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 120121221202021 its reverse (120202122121021), we get a palindrome (240323343323042).

The spelling of 120121221202021 in words is "one hundred twenty trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred two thousand, twenty-one".