222011100111121 has 2 divisors, whose sum is σ = 222011100111122. Its totient is φ = 222011100111120.

The previous prime is 222011100111113. The next prime is 222011100111127. The reversal of 222011100111121 is 121111001110222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200357796848400 + 21653303262721 = 14154780^2 + 4653311^2 .

It is a cyclic number.

It is not a de Polignac number, because 222011100111121 - 2³ = 222011100111113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222011100111095 and 222011100111104.

It is not a weakly prime, because it can be changed into another prime (222011100111127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111005550055560 + 111005550055561.

It is an arithmetic number, because the mean of its divisors is an integer number (111005550055561).

Almost surely, 2^{222011100111121} is an apocalyptic number.

It is an amenable number.

222011100111121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222011100111121 is an equidigital number, since it uses as much as digits as its factorization.

222011100111121 is an evil number, because the sum of its binary digits is even.

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

Adding to 222011100111121 its reverse (121111001110222), we get a palindrome (343122101221343).

The spelling of 222011100111121 in words is "two hundred twenty-two trillion, eleven billion, one hundred million, one hundred eleven thousand, one hundred twenty-one".