1211128268407 has 2 divisors, whose sum is σ = 1211128268408. Its totient is φ = 1211128268406.

The previous prime is 1211128268401. The next prime is 1211128268437. The reversal of 1211128268407 is 7048628211121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211128268407 - 2³⁵ = 1176768530039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211128268401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605564134203 + 605564134204.

It is an arithmetic number, because the mean of its divisors is an integer number (605564134204).

Almost surely, 2^{1211128268407} is an apocalyptic number.

1211128268407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211128268407 is an equidigital number, since it uses as much as digits as its factorization.

1211128268407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86016, while the sum is 43.

The spelling of 1211128268407 in words is "one trillion, two hundred eleven billion, one hundred twenty-eight million, two hundred sixty-eight thousand, four hundred seven".