112101220100021 has 4 divisors (see below), whose sum is σ = 112101614204544. Its totient is φ = 112100825995500.

The previous prime is 112101220099949. The next prime is 112101220100141. The reversal of 112101220100021 is 120001022101211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112101220100021 is a prime.

It is a super-2 number, since 2×112101220100021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 112101220099969 and 112101220100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112101220106021) 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, 196625285 + ... + 197194586.

It is an arithmetic number, because the mean of its divisors is an integer number (28025403551136).

Almost surely, 2^{112101220100021} is an apocalyptic number.

It is an amenable number.

112101220100021 is a deficient number, since it is larger than the sum of its proper divisors (394104523).

112101220100021 is an equidigital number, since it uses as much as digits as its factorization.

112101220100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394104522.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 112101220100021 its reverse (120001022101211), we get a palindrome (232102242201232).

The spelling of 112101220100021 in words is "one hundred twelve trillion, one hundred one billion, two hundred twenty million, one hundred thousand, twenty-one".