112212202121021 has 4 divisors (see below), whose sum is σ = 112702211737500. Its totient is φ = 111722192504544.

The previous prime is 112212202121009. The next prime is 112212202121023. The reversal of 112212202121021 is 120121202212211.

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 46851218592025 + 65360983528996 = 6844795^2 + 8084614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112212202121021 is a prime.

It is a super-2 number, since 2×112212202121021² (a number of 29 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 = 112212202120984 and 112212202121002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112212202121023) 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, 245004807896 + ... + 245004808353.

It is an arithmetic number, because the mean of its divisors is an integer number (28175552934375).

Almost surely, 2^{112212202121021} is an apocalyptic number.

It is an amenable number.

112212202121021 is a deficient number, since it is larger than the sum of its proper divisors (490009616479).

112212202121021 is an equidigital number, since it uses as much as digits as its factorization.

112212202121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490009616478.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 112212202121021 its reverse (120121202212211), we get a palindrome (232333404333232).

The spelling of 112212202121021 in words is "one hundred twelve trillion, two hundred twelve billion, two hundred two million, one hundred twenty-one thousand, twenty-one".