1123212219977 has 2 divisors, whose sum is σ = 1123212219978. Its totient is φ = 1123212219976.

The previous prime is 1123212219971. The next prime is 1123212220007. The reversal of 1123212219977 is 7799122123211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1022001705481 + 101210514496 = 1010941^2 + 318136^2 .

It is an emirp because it is prime and its reverse (7799122123211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123212219977 is a prime.

It is a super-2 number, since 2×1123212219977² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123212219971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561606109988 + 561606109989.

It is an arithmetic number, because the mean of its divisors is an integer number (561606109989).

Almost surely, 2^{1123212219977} is an apocalyptic number.

It is an amenable number.

1123212219977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123212219977 is an equidigital number, since it uses as much as digits as its factorization.

1123212219977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 47.

The spelling of 1123212219977 in words is "one trillion, one hundred twenty-three billion, two hundred twelve million, two hundred nineteen thousand, nine hundred seventy-seven".