121021221020021 has 8 divisors (see below), whose sum is σ = 138319107835584. Its totient is φ = 103725619443360.

The previous prime is 121021221019981. The next prime is 121021221020027. The reversal of 121021221020021 is 120020122120121.

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 121021221020021 - 2¹⁴ = 121021221003637 is a prime.

It is a super-2 number, since 2×121021221020021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021221020027) 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, 571196240 + ... + 571408073.

It is an arithmetic number, because the mean of its divisors is an integer number (17289888479448).

Almost surely, 2^{121021221020021} is an apocalyptic number.

It is an amenable number.

121021221020021 is a deficient number, since it is larger than the sum of its proper divisors (17297886815563).

121021221020021 is a wasteful number, since it uses less digits than its factorization.

121021221020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142619451.

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

Adding to 121021221020021 its reverse (120020122120121), we get a palindrome (241041343140142).

The spelling of 121021221020021 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred twenty-one million, twenty thousand, twenty-one".