121120002220021 has 8 divisors (see below), whose sum is σ = 138423086015040. Its totient is φ = 103816975008768.

The previous prime is 121120002220013. The next prime is 121120002220033. The reversal of 121120002220021 is 120022200021121.

It is a happy number.

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

It is not a de Polignac number, because 121120002220021 - 2³ = 121120002220013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121120002219977 and 121120002220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120002020021) 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, 9455371 + ... + 18211096.

It is an arithmetic number, because the mean of its divisors is an integer number (17302885751880).

Almost surely, 2^{121120002220021} is an apocalyptic number.

It is an amenable number.

121120002220021 is a deficient number, since it is larger than the sum of its proper divisors (17303083795019).

121120002220021 is an equidigital number, since it uses as much as digits as its factorization.

121120002220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28291883.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121120002220021 its reverse (120022200021121), we get a palindrome (241142202241142).

The spelling of 121120002220021 in words is "one hundred twenty-one trillion, one hundred twenty billion, two million, two hundred twenty thousand, twenty-one".