1000000211989 has 2 divisors, whose sum is σ = 1000000211990. Its totient is φ = 1000000211988.

The previous prime is 1000000211953. The next prime is 1000000212053. The reversal of 1000000211989 is 9891120000001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 889547012964 + 110453199025 = 943158^2 + 332345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000000211989 - 2¹⁷ = 1000000080917 is a prime.

It is a super-2 number, since 2×1000000211989² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1000000211989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000000211489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500000105994 + 500000105995.

It is an arithmetic number, because the mean of its divisors is an integer number (500000105995).

Almost surely, 2^{1000000211989} is an apocalyptic number.

It is an amenable number.

1000000211989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000000211989 is an equidigital number, since it uses as much as digits as its factorization.

1000000211989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 1000000211989 in words is "one trillion, two hundred eleven thousand, nine hundred eighty-nine".