1012199891029 has 2 divisors, whose sum is σ = 1012199891030. Its totient is φ = 1012199891028.

The previous prime is 1012199891023. The next prime is 1012199891069. The reversal of 1012199891029 is 9201989912101.

1012199891029 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 972783744804 + 39416146225 = 986298^2 + 198535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012199891029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012199891023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506099945514 + 506099945515.

It is an arithmetic number, because the mean of its divisors is an integer number (506099945515).

Almost surely, 2^{1012199891029} is an apocalyptic number.

It is an amenable number.

1012199891029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012199891029 is an equidigital number, since it uses as much as digits as its factorization.

1012199891029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 52.

The spelling of 1012199891029 in words is "one trillion, twelve billion, one hundred ninety-nine million, eight hundred ninety-one thousand, twenty-nine".