121101021120021 has 8 divisors (see below), whose sum is σ = 168488377210560. Its totient is φ = 77223839554752.

The previous prime is 121101021119987. The next prime is 121101021120047. The reversal of 121101021120021 is 120021120101121.

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 121101021120021 - 2⁷ = 121101021119893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101021120061) 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 7 ways as a sum of consecutive naturals, for example, 877543631236 + ... + 877543631373.

It is an arithmetic number, because the mean of its divisors is an integer number (21061047151320).

Almost surely, 2^{121101021120021} is an apocalyptic number.

It is an amenable number.

121101021120021 is a deficient number, since it is larger than the sum of its proper divisors (47387356090539).

121101021120021 is a wasteful number, since it uses less digits than its factorization.

121101021120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755087262635.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121101021120021 its reverse (120021120101121), we get a palindrome (241122141221142).

The spelling of 121101021120021 in words is "one hundred twenty-one trillion, one hundred one billion, twenty-one million, one hundred twenty thousand, twenty-one".