1011190912021 has 2 divisors, whose sum is σ = 1011190912022. Its totient is φ = 1011190912020.

The previous prime is 1011190911989. The next prime is 1011190912037. The reversal of 1011190912021 is 1202190911101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 676858325796 + 334332586225 = 822714^2 + 578215^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011190912021 - 2⁵ = 1011190911989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011190910021) 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, 505595456010 + 505595456011.

It is an arithmetic number, because the mean of its divisors is an integer number (505595456011).

Almost surely, 2^{1011190912021} is an apocalyptic number.

It is an amenable number.

1011190912021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011190912021 is an equidigital number, since it uses as much as digits as its factorization.

1011190912021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 1011190912021 in words is "one trillion, eleven billion, one hundred ninety million, nine hundred twelve thousand, twenty-one".