1001212021109 has 2 divisors, whose sum is σ = 1001212021110. Its totient is φ = 1001212021108.

The previous prime is 1001212021099. The next prime is 1001212021157. The reversal of 1001212021109 is 9011202121001.

1001212021109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 969246157009 + 31965864100 = 984503^2 + 178790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001212021109 - 2⁴ = 1001212021093 is a prime.

It is a super-2 number, since 2×1001212021109² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001212021009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500606010554 + 500606010555.

It is an arithmetic number, because the mean of its divisors is an integer number (500606010555).

Almost surely, 2^{1001212021109} is an apocalyptic number.

It is an amenable number.

1001212021109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001212021109 is an equidigital number, since it uses as much as digits as its factorization.

1001212021109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1001212021109 in words is "one trillion, one billion, two hundred twelve million, twenty-one thousand, one hundred nine".