121020233121 has 6 divisors (see below), whose sum is σ = 174807003410. Its totient is φ = 80680155408.

The previous prime is 121020233099. The next prime is 121020233137. The reversal of 121020233121 is 121332020121.

It can be written as a sum of positive squares in only one way, i.e., 65116832400 + 55903400721 = 255180^2 + 236439^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121020233121 is a prime.

It is a super-2 number, since 2×121020233121² (a number of 23 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 = 121020233094 and 121020233103.

It is not an unprimeable number, because it can be changed into a prime (121020233171) 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 5 ways as a sum of consecutive naturals, for example, 6723346276 + ... + 6723346293.

Almost surely, 2^121020233121 is an apocalyptic number.

It is an amenable number.

121020233121 is a deficient number, since it is larger than the sum of its proper divisors (53786770289).

121020233121 is a wasteful number, since it uses less digits than its factorization.

121020233121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13446692575 (or 13446692572 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121020233121 its reverse (121332020121), we get a palindrome (242352253242).

The spelling of 121020233121 in words is "one hundred twenty-one billion, twenty million, two hundred thirty-three thousand, one hundred twenty-one".