1921112113201 has 8 divisors (see below), whose sum is σ = 1928398706240. Its totient is φ = 1913837820048.

The previous prime is 1921112113199. The next prime is 1921112113213. The reversal of 1921112113201 is 1023112111291.

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 1921112113201 - 2¹ = 1921112113199 is a prime.

It is a super-2 number, since 2×1921112113201² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1921112113231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2761941 + ... + 3386818.

It is an arithmetic number, because the mean of its divisors is an integer number (241049838280).

Almost surely, 2^{1921112113201} is an apocalyptic number.

It is an amenable number.

1921112113201 is a deficient number, since it is larger than the sum of its proper divisors (7286593039).

1921112113201 is an equidigital number, since it uses as much as digits as its factorization.

1921112113201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6149943.

The product of its (nonzero) digits is 216, while the sum is 25.

Adding to 1921112113201 its reverse (1023112111291), we get a palindrome (2944224224492).

The spelling of 1921112113201 in words is "one trillion, nine hundred twenty-one billion, one hundred twelve million, one hundred thirteen thousand, two hundred one".