2012021999989 has 2 divisors, whose sum is σ = 2012021999990. Its totient is φ = 2012021999988.

The previous prime is 2012021999987. The next prime is 2012022000019. The reversal of 2012021999989 is 9899991202102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1799399567889 + 212622432100 = 1341417^2 + 461110^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012021999989 - 2¹ = 2012021999987 is a prime.

Together with 2012021999987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012021999987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006010999994 + 1006010999995.

It is an arithmetic number, because the mean of its divisors is an integer number (1006010999995).

Almost surely, 2^{2012021999989} is an apocalyptic number.

It is an amenable number.

2012021999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012021999989 is an equidigital number, since it uses as much as digits as its factorization.

2012021999989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3779136, while the sum is 61.

The spelling of 2012021999989 in words is "two trillion, twelve billion, twenty-one million, nine hundred ninety-nine thousand, nine hundred eighty-nine".