121121001221121 has 48 divisors (see below), whose sum is σ = 202742493041088. Its totient is φ = 68863583462400.

The previous prime is 121121001221093. The next prime is 121121001221161. The reversal of 121121001221121 is 121122100121121.

It is a happy number.

121121001221121 is a `hidden beast` number, since 1 + 211 + 210 + 0 + 1 + 221 + 1 + 21 = 666.

It is not a de Polignac number, because 121121001221121 - 2⁵ = 121121001221089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121121001221094 and 121121001221103.

It is not an unprimeable number, because it can be changed into a prime (121121001221161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 116693940 + ... + 117727301.

It is an arithmetic number, because the mean of its divisors is an integer number (4223801938356).

Almost surely, 2^{121121001221121} is an apocalyptic number.

121121001221121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121121001221121 is a deficient number, since it is larger than the sum of its proper divisors (81621491819967).

121121001221121 is a wasteful number, since it uses less digits than its factorization.

121121001221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234421582 (or 234421579 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121121001221121 its reverse (121122100121121), we get a palindrome (242243101342242).

The spelling of 121121001221121 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one million, two hundred twenty-one thousand, one hundred twenty-one".