1000202111989 has 2 divisors, whose sum is σ = 1000202111990. Its totient is φ = 1000202111988.

The previous prime is 1000202111969. The next prime is 1000202112023. The reversal of 1000202111989 is 9891112020001.

1000202111989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (1000202112023) can be obtained adding 1000202111989 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 978995471364 + 21206640625 = 989442^2 + 145625^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000202111989 - 2²¹ = 1000200014837 is a prime.

It is a super-2 number, since 2×1000202111989² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000202111929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500101055994 + 500101055995.

It is an arithmetic number, because the mean of its divisors is an integer number (500101055995).

Almost surely, 2^{1000202111989} is an apocalyptic number.

It is an amenable number.

1000202111989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000202111989 is an equidigital number, since it uses as much as digits as its factorization.

1000202111989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 1000202111989 in words is "one trillion, two hundred two million, one hundred eleven thousand, nine hundred eighty-nine".