112112210120021 has 4 divisors (see below), whose sum is σ = 118707046009452. Its totient is φ = 105517374230592.

The previous prime is 112112210119961. The next prime is 112112210120063. The reversal of 112112210120021 is 120021012211211.

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 44603884960996 + 67508325159025 = 6678614^2 + 8216345^2 .

It is a cyclic number.

It is not a de Polignac number, because 112112210120021 - 2²⁶ = 112112143011157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 6594835889413 = 112112210120021 / (1 + 1 + 2 + 1 + 1 + 2 + 2 + 1 + 0 + 1 + 2 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112112210120321) 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, 3297417944690 + ... + 3297417944723.

It is an arithmetic number, because the mean of its divisors is an integer number (29676761502363).

Almost surely, 2^{112112210120021} is an apocalyptic number.

It is an amenable number.

112112210120021 is a deficient number, since it is larger than the sum of its proper divisors (6594835889431).

112112210120021 is an equidigital number, since it uses as much as digits as its factorization.

112112210120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6594835889430.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 112112210120021 its reverse (120021012211211), we get a palindrome (232133222331232).

The spelling of 112112210120021 in words is "one hundred twelve trillion, one hundred twelve billion, two hundred ten million, one hundred twenty thousand, twenty-one".