111212222057 has 2 divisors, whose sum is σ = 111212222058. Its totient is φ = 111212222056.

The previous prime is 111212222053. The next prime is 111212222111. The reversal of 111212222057 is 750222212111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68240590441 + 42971631616 = 261229^2 + 207296^2 .

It is a cyclic number.

It is not a de Polignac number, because 111212222057 - 2² = 111212222053 is a prime.

It is a super-2 number, since 2×111212222057² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111212222053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606111028 + 55606111029.

It is an arithmetic number, because the mean of its divisors is an integer number (55606111029).

Almost surely, 2^111212222057 is an apocalyptic number.

It is an amenable number.

111212222057 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212222057 is an equidigital number, since it uses as much as digits as its factorization.

111212222057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 26.

Adding to 111212222057 its reverse (750222212111), we get a palindrome (861434434168).

The spelling of 111212222057 in words is "one hundred eleven billion, two hundred twelve million, two hundred twenty-two thousand, fifty-seven".