121021122100121 has 4 divisors (see below), whose sum is σ = 122092105481652. Its totient is φ = 119950138718592.

The previous prime is 121021122100097. The next prime is 121021122100163. The reversal of 121021122100121 is 121001221120121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18277335040000 + 102743787060121 = 4275200^2 + 10136261^2 .

It is a cyclic number.

It is not a de Polignac number, because 121021122100121 - 2¹⁴ = 121021122083737 is a prime.

It is a super-2 number, since 2×121021122100121² (a number of 29 digits) contains 22 as substring.

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 121021122100121.

It is not an unprimeable number, because it can be changed into a prime (121021122150121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535491690596 + ... + 535491690821.

It is an arithmetic number, because the mean of its divisors is an integer number (30523026370413).

Almost surely, 2^{121021122100121} is an apocalyptic number.

It is an amenable number.

121021122100121 is a deficient number, since it is larger than the sum of its proper divisors (1070983381531).

121021122100121 is a wasteful number, since it uses less digits than its factorization.

121021122100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070983381530.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121021122100121 its reverse (121001221120121), we get a palindrome (242022343220242).

The spelling of 121021122100121 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred twenty-two million, one hundred thousand, one hundred twenty-one".