1001211099997 has 2 divisors, whose sum is σ = 1001211099998. Its totient is φ = 1001211099996.

The previous prime is 1001211099991. The next prime is 1001211100009. The reversal of 1001211099997 is 7999901121001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 629386768921 + 371824331076 = 793339^2 + 609774^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001211099997 - 2³ = 1001211099989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001211099997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001211099991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500605549998 + 500605549999.

It is an arithmetic number, because the mean of its divisors is an integer number (500605549999).

Almost surely, 2^{1001211099997} is an apocalyptic number.

It is an amenable number.

1001211099997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001211099997 is an equidigital number, since it uses as much as digits as its factorization.

1001211099997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 49.

The spelling of 1001211099997 in words is "one trillion, one billion, two hundred eleven million, ninety-nine thousand, nine hundred ninety-seven".