1112210011921 has 2 divisors, whose sum is σ = 1112210011922. Its totient is φ = 1112210011920.

The previous prime is 1112210011919. The next prime is 1112210011963. The reversal of 1112210011921 is 1291100122111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1088767033600 + 23442978321 = 1043440^2 + 153111^2 .

It is an emirp because it is prime and its reverse (1291100122111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1112210011921 - 2¹ = 1112210011919 is a prime.

It is a super-2 number, since 2×1112210011921² (a number of 25 digits) contains 22 as substring.

Together with 1112210011919, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1112210011892 and 1112210011901.

It is not a weakly prime, because it can be changed into another prime (1112210017921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556105005960 + 556105005961.

It is an arithmetic number, because the mean of its divisors is an integer number (556105005961).

Almost surely, 2^{1112210011921} is an apocalyptic number.

It is an amenable number.

1112210011921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112210011921 is an equidigital number, since it uses as much as digits as its factorization.

1112210011921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 1112210011921 in words is "one trillion, one hundred twelve billion, two hundred ten million, eleven thousand, nine hundred twenty-one".