1011211099 has 4 divisors (see below), whose sum is σ = 1012142464. Its totient is φ = 1010279736.

The previous prime is 1011211079. The next prime is 1011211127. The reversal of 1011211099 is 9901121101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9901121101 = 29 ⋅341417969.

It is a cyclic number.

It is not a de Polignac number, because 1011211099 - 2¹⁵ = 1011178331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011211079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464052 + ... + 466225.

It is an arithmetic number, because the mean of its divisors is an integer number (253035616).

Almost surely, 2^1011211099 is an apocalyptic number.

1011211099 is a deficient number, since it is larger than the sum of its proper divisors (931365).

1011211099 is an equidigital number, since it uses as much as digits as its factorization.

1011211099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931364.

The product of its (nonzero) digits is 162, while the sum is 25.

The square root of 1011211099 is about 31799.5455785142. The cubic root of 1011211099 is about 1003.7231539216.

The spelling of 1011211099 in words is "one billion, eleven million, two hundred eleven thousand, ninety-nine".