245112244021121 has 4 divisors (see below), whose sum is σ = 245352314780244. Its totient is φ = 244872173262000.

The previous prime is 245112244021049. The next prime is 245112244021129. The reversal of 245112244021121 is 121120442211542.

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 153444334180225 + 91667909840896 = 12387265^2 + 9574336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245112244021121 is a prime.

It is a super-2 number, since 2×245112244021121² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245112244021129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120035378030 + ... + 120035380071.

It is an arithmetic number, because the mean of its divisors is an integer number (61338078695061).

Almost surely, 2^{245112244021121} is an apocalyptic number.

It is an amenable number.

245112244021121 is a deficient number, since it is larger than the sum of its proper divisors (240070759123).

245112244021121 is a wasteful number, since it uses less digits than its factorization.

245112244021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240070759122.

The product of its (nonzero) digits is 10240, while the sum is 32.

Adding to 245112244021121 its reverse (121120442211542), we get a palindrome (366232686232663).

The spelling of 245112244021121 in words is "two hundred forty-five trillion, one hundred twelve billion, two hundred forty-four million, twenty-one thousand, one hundred twenty-one".