112121212020021 has 8 divisors (see below), whose sum is σ = 166105499288960. Its totient is φ = 74747474679996.

The previous prime is 112121212020019. The next prime is 112121212020023. The reversal of 112121212020021 is 120020212121211.

112121212020021 is a `hidden beast` number, since 112 + 1 + 212 + 120 + 200 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (112121212020019) and next prime (112121212020023).

It is not a de Polignac number, because 112121212020021 - 2¹ = 112121212020019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112121212019976 and 112121212020003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112121212020023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2076318741085 + ... + 2076318741138.

It is an arithmetic number, because the mean of its divisors is an integer number (20763187411120).

Almost surely, 2^{112121212020021} is an apocalyptic number.

It is an amenable number.

112121212020021 is a deficient number, since it is larger than the sum of its proper divisors (53984287268939).

112121212020021 is an equidigital number, since it uses as much as digits as its factorization.

112121212020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4152637482232 (or 4152637482226 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 112121212020021 its reverse (120020212121211), we get a palindrome (232141424141232).

The spelling of 112121212020021 in words is "one hundred twelve trillion, one hundred twenty-one billion, two hundred twelve million, twenty thousand, twenty-one".