1021100221139 has 2 divisors, whose sum is σ = 1021100221140. Its totient is φ = 1021100221138.

The previous prime is 1021100221103. The next prime is 1021100221201. The reversal of 1021100221139 is 9311220011201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021100221139 - 2³² = 1016805253843 is a prime.

It is a super-2 number, since 2×1021100221139² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1021105221139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510550110569 + 510550110570.

It is an arithmetic number, because the mean of its divisors is an integer number (510550110570).

Almost surely, 2^{1021100221139} is an apocalyptic number.

1021100221139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021100221139 is an equidigital number, since it uses as much as digits as its factorization.

1021100221139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 1021100221139 in words is "one trillion, twenty-one billion, one hundred million, two hundred twenty-one thousand, one hundred thirty-nine".