111021132121 has 2 divisors, whose sum is σ = 111021132122. Its totient is φ = 111021132120.

The previous prime is 111021132119. The next prime is 111021132151. The reversal of 111021132121 is 121231120111.

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., 73677502096 + 37343630025 = 271436^2 + 193245^2 .

It is a cyclic number.

It is not a de Polignac number, because 111021132121 - 2¹ = 111021132119 is a prime.

Together with 111021132119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 111021132095 and 111021132104.

It is not a weakly prime, because it can be changed into another prime (111021132151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510566060 + 55510566061.

It is an arithmetic number, because the mean of its divisors is an integer number (55510566061).

Almost surely, 2^111021132121 is an apocalyptic number.

It is an amenable number.

111021132121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021132121 is an equidigital number, since it uses as much as digits as its factorization.

111021132121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 111021132121 its reverse (121231120111), we get a palindrome (232252252232).

The spelling of 111021132121 in words is "one hundred eleven billion, twenty-one million, one hundred thirty-two thousand, one hundred twenty-one".