1011100210921 has 2 divisors, whose sum is σ = 1011100210922. Its totient is φ = 1011100210920.

The previous prime is 1011100210843. The next prime is 1011100210979. The reversal of 1011100210921 is 1290120011101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 691350675625 + 319749535296 = 831475^2 + 565464^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011100210921 - 2⁹ = 1011100210409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011100217921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505550105460 + 505550105461.

It is an arithmetic number, because the mean of its divisors is an integer number (505550105461).

Almost surely, 2^{1011100210921} is an apocalyptic number.

It is an amenable number.

1011100210921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011100210921 is an equidigital number, since it uses as much as digits as its factorization.

1011100210921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 1011100210921 in words is "one trillion, eleven billion, one hundred million, two hundred ten thousand, nine hundred twenty-one".