121021100201221 has 32 divisors (see below), whose sum is σ = 136780565760000. Its totient is φ = 106066045632960.

The previous prime is 121021100201207. The next prime is 121021100201269. The reversal of 121021100201221 is 122102001120121.

It is a cyclic number.

It is not a de Polignac number, because 121021100201221 - 2⁵ = 121021100201189 is a prime.

It is a super-2 number, since 2×121021100201221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121021100201195 and 121021100201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021100202221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 720798960 + ... + 720966838.

It is an arithmetic number, because the mean of its divisors is an integer number (4274392680000).

Almost surely, 2^{121021100201221} is an apocalyptic number.

121021100201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121021100201221 is a deficient number, since it is larger than the sum of its proper divisors (15759465558779).

121021100201221 is a wasteful number, since it uses less digits than its factorization.

121021100201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171297.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121021100201221 its reverse (122102001120121), we get a palindrome (243123101321342).

The spelling of 121021100201221 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred million, two hundred one thousand, two hundred twenty-one".