1021120021039 has 2 divisors, whose sum is σ = 1021120021040. Its totient is φ = 1021120021038.

The previous prime is 1021120020923. The next prime is 1021120021063. The reversal of 1021120021039 is 9301200211201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021120021039 - 2¹¹ = 1021120018991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021120021079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510560010519 + 510560010520.

It is an arithmetic number, because the mean of its divisors is an integer number (510560010520).

Almost surely, 2^{1021120021039} is an apocalyptic number.

1021120021039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021120021039 is an equidigital number, since it uses as much as digits as its factorization.

1021120021039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 1021120021039 in words is "one trillion, twenty-one billion, one hundred twenty million, twenty-one thousand, thirty-nine".