112101212210021 has 4 divisors (see below), whose sum is σ = 112111241854572. Its totient is φ = 112091182565472.

The previous prime is 112101212209979. The next prime is 112101212210107. The reversal of 112101212210021 is 120012212101211.

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 100647143613025 + 11454068596996 = 10032305^2 + 3384386^2 .

It is a cyclic number.

It is not a de Polignac number, because 112101212210021 - 2²⁶ = 112101145101157 is a prime.

It is a super-2 number, since 2×112101212210021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112101212210921) 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, 5014805510 + ... + 5014827863.

It is an arithmetic number, because the mean of its divisors is an integer number (28027810463643).

Almost surely, 2^{112101212210021} is an apocalyptic number.

It is an amenable number.

112101212210021 is a deficient number, since it is larger than the sum of its proper divisors (10029644551).

112101212210021 is a wasteful number, since it uses less digits than its factorization.

112101212210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10029644550.

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

Adding to 112101212210021 its reverse (120012212101211), we get a palindrome (232113424311232).

The spelling of 112101212210021 in words is "one hundred twelve trillion, one hundred one billion, two hundred twelve million, two hundred ten thousand, twenty-one".