121002121220121 has 24 divisors (see below), whose sum is σ = 175749705246024. Its totient is φ = 80220929402880.

The previous prime is 121002121220083. The next prime is 121002121220131. The reversal of 121002121220121 is 121022121200121.

121002121220121 is a `hidden beast` number, since 1 + 210 + 0 + 21 + 212 + 201 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 44962657376400 + 76039463843721 = 6705420^2 + 8720061^2 .

It is not a de Polignac number, because 121002121220121 - 2³⁴ = 120984941350937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121002121220094 and 121002121220103.

It is not an unprimeable number, because it can be changed into a prime (121002121220131) 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 23 ways as a sum of consecutive naturals, for example, 92032455 + ... + 93337971.

It is an arithmetic number, because the mean of its divisors is an integer number (7322904385251).

Almost surely, 2^{121002121220121} is an apocalyptic number.

It is an amenable number.

121002121220121 is a deficient number, since it is larger than the sum of its proper divisors (54747584025903).

121002121220121 is a wasteful number, since it uses less digits than its factorization.

121002121220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362601 (or 1362598 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121002121220121 its reverse (121022121200121), we get a palindrome (242024242420242).

The spelling of 121002121220121 in words is "one hundred twenty-one trillion, two billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twenty-one".