121120323021 has 6 divisors (see below), whose sum is σ = 174951577710. Its totient is φ = 80746882008.

The previous prime is 121120323007. The next prime is 121120323041. The reversal of 121120323021 is 120323021121.

121120323021 is a `hidden beast` number, since 1 + 211 + 203 + 230 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 67706642025 + 53413680996 = 260205^2 + 231114^2 .

It is not a de Polignac number, because 121120323021 - 2⁶ = 121120322957 is a prime.

It is a super-2 number, since 2×121120323021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121120322985 and 121120323003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120323041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6728906826 + ... + 6728906843.

It is an arithmetic number, because the mean of its divisors is an integer number (29158596285).

Almost surely, 2^121120323021 is an apocalyptic number.

It is an amenable number.

121120323021 is a deficient number, since it is larger than the sum of its proper divisors (53831254689).

121120323021 is a wasteful number, since it uses less digits than its factorization.

121120323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13457813675 (or 13457813672 counting only the distinct ones).

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

Adding to 121120323021 its reverse (120323021121), we get a palindrome (241443344142).

The spelling of 121120323021 in words is "one hundred twenty-one billion, one hundred twenty million, three hundred twenty-three thousand, twenty-one".