121121221012021 has 8 divisors (see below), whose sum is σ = 121877454608000. Its totient is φ = 120365944071120.

The previous prime is 121121221012007. The next prime is 121121221012061. The reversal of 121121221012021 is 120210122121121.

It is a happy number.

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 121121221012021 - 2⁷ = 121121221011893 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 121121221012021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121221012061) 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, 238909761 + ... + 239416198.

It is an arithmetic number, because the mean of its divisors is an integer number (15234681826000).

Almost surely, 2^{121121221012021} is an apocalyptic number.

It is an amenable number.

121121221012021 is a deficient number, since it is larger than the sum of its proper divisors (756233595979).

121121221012021 is a wasteful number, since it uses less digits than its factorization.

121121221012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478327539.

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

Adding to 121121221012021 its reverse (120210122121121), we get a palindrome (241331343133142).

The spelling of 121121221012021 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty-one million, twelve thousand, twenty-one".