1121000221111 has 2 divisors, whose sum is σ = 1121000221112. Its totient is φ = 1121000221110.

The previous prime is 1121000221091. The next prime is 1121000221123. The reversal of 1121000221111 is 1111220001211.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1111220001211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121000221111 - 2¹⁹ = 1120999696823 is a prime.

It is a super-4 number, since 4×1121000221111⁴ (a number of 49 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121000221091 and 1121000221100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121000221151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560500110555 + 560500110556.

It is an arithmetic number, because the mean of its divisors is an integer number (560500110556).

Almost surely, 2^{1121000221111} is an apocalyptic number.

1121000221111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121000221111 is an equidigital number, since it uses as much as digits as its factorization.

1121000221111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1121000221111 its reverse (1111220001211), we get a palindrome (2232220222322).

The spelling of 1121000221111 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-one thousand, one hundred eleven".