1021000221029 has 2 divisors, whose sum is σ = 1021000221030. Its totient is φ = 1021000221028.

The previous prime is 1021000220957. The next prime is 1021000221067. The reversal of 1021000221029 is 9201220001201.

It is a happy number.

1021000221029 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 886328102500 + 134672118529 = 941450^2 + 366977^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021000221029 - 2¹² = 1021000216933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021000221029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021000421029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510500110514 + 510500110515.

It is an arithmetic number, because the mean of its divisors is an integer number (510500110515).

Almost surely, 2^{1021000221029} is an apocalyptic number.

It is an amenable number.

1021000221029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021000221029 is an equidigital number, since it uses as much as digits as its factorization.

1021000221029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 1021000221029 in words is "one trillion, twenty-one billion, two hundred twenty-one thousand, twenty-nine".