2211111309997 has 2 divisors, whose sum is σ = 2211111309998. Its totient is φ = 2211111309996.

The previous prime is 2211111309977. The next prime is 2211111310049. The reversal of 2211111309997 is 7999031111122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1858297881636 + 352813428361 = 1363194^2 + 593981^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211111309997 - 2¹¹ = 2211111307949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211111309977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105555654998 + 1105555654999.

It is an arithmetic number, because the mean of its divisors is an integer number (1105555654999).

Almost surely, 2^{2211111309997} is an apocalyptic number.

It is an amenable number.

2211111309997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211111309997 is an equidigital number, since it uses as much as digits as its factorization.

2211111309997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 46.

The spelling of 2211111309997 in words is "two trillion, two hundred eleven billion, one hundred eleven million, three hundred nine thousand, nine hundred ninety-seven".