1111212011 has 12 divisors (see below), whose sum is σ = 1375161552. Its totient is φ = 879199776.

The previous prime is 1111211993. The next prime is 1111212029. The reversal of 1111212011 is 1102121111.

It is an interprime number because it is at equal distance from previous prime (1111211993) and next prime (1111212029).

It is not a de Polignac number, because 1111212011 - 2¹⁸ = 1110949867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111211983 and 1111212001.

It is not an unprimeable number, because it can be changed into a prime (1111212031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 468476 + ... + 470841.

It is an arithmetic number, because the mean of its divisors is an integer number (114596796).

Almost surely, 2^1111212011 is an apocalyptic number.

1111212011 is a deficient number, since it is larger than the sum of its proper divisors (263949541).

1111212011 is an equidigital number, since it uses as much as digits as its factorization.

1111212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939350 (or 939337 counting only the distinct ones).

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

The square root of 1111212011 is about 33334.8467973081. The cubic root of 1111212011 is about 1035.7755196438.

Adding to 1111212011 its reverse (1102121111), we get a palindrome (2213333122).

The spelling of 1111212011 in words is "one billion, one hundred eleven million, two hundred twelve thousand, eleven".