1011010109621 has 2 divisors, whose sum is σ = 1011010109622. Its totient is φ = 1011010109620.

The previous prime is 1011010109573. The next prime is 1011010109651. The reversal of 1011010109621 is 1269010101101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 849510612721 + 161499496900 = 921689^2 + 401870^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011010109621 - 2¹⁰ = 1011010108597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011010109651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505505054810 + 505505054811.

It is an arithmetic number, because the mean of its divisors is an integer number (505505054811).

Almost surely, 2^{1011010109621} is an apocalyptic number.

It is an amenable number.

1011010109621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011010109621 is an equidigital number, since it uses as much as digits as its factorization.

1011010109621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 23.

The spelling of 1011010109621 in words is "one trillion, eleven billion, ten million, one hundred nine thousand, six hundred twenty-one".