1021121201029 has 2 divisors, whose sum is σ = 1021121201030. Its totient is φ = 1021121201028.

The previous prime is 1021121200991. The next prime is 1021121201039. The reversal of 1021121201029 is 9201021211201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 732268698529 + 288852502500 = 855727^2 + 537450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021121201029 - 2²⁷ = 1020986983301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021121201039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510560600514 + 510560600515.

It is an arithmetic number, because the mean of its divisors is an integer number (510560600515).

Almost surely, 2^{1021121201029} is an apocalyptic number.

It is an amenable number.

1021121201029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021121201029 is an equidigital number, since it uses as much as digits as its factorization.

1021121201029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 1021121201029 in words is "one trillion, twenty-one billion, one hundred twenty-one million, two hundred one thousand, twenty-nine".