2124919891697 has 2 divisors, whose sum is σ = 2124919891698. Its totient is φ = 2124919891696.

The previous prime is 2124919891693. The next prime is 2124919891711. The reversal of 2124919891697 is 7961989194212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2090016684721 + 34903206976 = 1445689^2 + 186824^2 .

It is a cyclic number.

It is not a de Polignac number, because 2124919891697 - 2² = 2124919891693 is a prime.

It is a super-2 number, since 2×2124919891697² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2124919891693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062459945848 + 1062459945849.

It is an arithmetic number, because the mean of its divisors is an integer number (1062459945849).

Almost surely, 2^{2124919891697} is an apocalyptic number.

It is an amenable number.

2124919891697 is a deficient number, since it is larger than the sum of its proper divisors (1).

2124919891697 is an equidigital number, since it uses as much as digits as its factorization.

2124919891697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35271936, while the sum is 68.

The spelling of 2124919891697 in words is "two trillion, one hundred twenty-four billion, nine hundred nineteen million, eight hundred ninety-one thousand, six hundred ninety-seven".