121112230021 has 4 divisors (see below), whose sum is σ = 121254214732. Its totient is φ = 120970245312.

The previous prime is 121112230009. The next prime is 121112230049. The reversal of 121112230021 is 120032211121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56233008225 + 64879221796 = 237135^2 + 254714^2 .

It is a cyclic number.

It is not a de Polignac number, because 121112230021 - 2¹⁵ = 121112197253 is a prime.

It is a super-2 number, since 2×121112230021² (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 = 121112229977 and 121112230004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112230051) 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 3 ways as a sum of consecutive naturals, for example, 70991076 + ... + 70992781.

It is an arithmetic number, because the mean of its divisors is an integer number (30313553683).

Almost surely, 2^121112230021 is an apocalyptic number.

It is an amenable number.

121112230021 is a deficient number, since it is larger than the sum of its proper divisors (141984711).

121112230021 is an equidigital number, since it uses as much as digits as its factorization.

121112230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141984710.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121112230021 its reverse (120032211121), we get a palindrome (241144441142).

The spelling of 121112230021 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred thirty thousand, twenty-one".