121121200020121 has 16 divisors (see below), whose sum is σ = 148458954211200. Its totient is φ = 96498320226048.

The previous prime is 121121200020053. The next prime is 121121200020131. The reversal of 121121200020121 is 121020002121121.

It is a cyclic number.

It is not a de Polignac number, because 121121200020121 - 2⁷ = 121121200019993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121121200020095 and 121121200020104.

It is not an unprimeable number, because it can be changed into a prime (121121200020131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8591367616 + ... + 8591381713.

It is an arithmetic number, because the mean of its divisors is an integer number (9278684638200).

Almost surely, 2^{121121200020121} is an apocalyptic number.

It is an amenable number.

121121200020121 is a deficient number, since it is larger than the sum of its proper divisors (27337754191079).

121121200020121 is a wasteful number, since it uses less digits than its factorization.

121121200020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17182749408.

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

Adding to 121121200020121 its reverse (121020002121121), we get a palindrome (242141202141242).

The spelling of 121121200020121 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred million, twenty thousand, one hundred twenty-one".