1011211211 has 4 divisors (see below), whose sum is σ = 1019173632. Its totient is φ = 1003248792.

The previous prime is 1011211193. The next prime is 1011211231. The reversal of 1011211211 is 1121121101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1121121101 = 311 ⋅3604891.

It is a cyclic number.

It is not a de Polignac number, because 1011211211 - 2¹⁴ = 1011194827 is a prime.

It is a super-2 number, since 2×1011211211² = 2045096226504173042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011211192 and 1011211201.

It is not an unprimeable number, because it can be changed into a prime (1011211231) 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, 3981020 + ... + 3981273.

It is an arithmetic number, because the mean of its divisors is an integer number (254793408).

Almost surely, 2^1011211211 is an apocalyptic number.

1011211211 is a deficient number, since it is larger than the sum of its proper divisors (7962421).

1011211211 is an equidigital number, since it uses as much as digits as its factorization.

1011211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7962420.

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 1011211211 is about 31799.5473395456. The cubic root of 1011211211 is about 1003.7231909785.

Adding to 1011211211 its reverse (1121121101), we get a palindrome (2132332312).

The spelling of 1011211211 in words is "one billion, eleven million, two hundred eleven thousand, two hundred eleven".