112121121220021 has 8 divisors (see below), whose sum is σ = 118037662776000. Its totient is φ = 106206122655360.

The previous prime is 112121121219959. The next prime is 112121121220049. The reversal of 112121121220021 is 120022121121211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 112121121220021 - 2⁹ = 112121121219509 is a prime.

It is a super-2 number, since 2×112121121220021² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112121121220051) 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, 385598665 + ... + 385889326.

It is an arithmetic number, because the mean of its divisors is an integer number (14754707847000).

Almost surely, 2^{112121121220021} is an apocalyptic number.

It is an amenable number.

112121121220021 is a deficient number, since it is larger than the sum of its proper divisors (5916541555979).

112121121220021 is an equidigital number, since it uses as much as digits as its factorization.

112121121220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771495659.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 112121121220021 its reverse (120022121121211), we get a palindrome (232143242341232).

The spelling of 112121121220021 in words is "one hundred twelve trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, twenty-one".