11011021212 has 24 divisors (see below), whose sum is σ = 25946765712. Its totient is φ = 3634000000.

The previous prime is 11011021121. The next prime is 11011021247. The reversal of 11011021212 is 21212011011.

It is a super-2 number, since 2×11011021212² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4541289 + ... + 4543712.

It is an arithmetic number, because the mean of its divisors is an integer number (1081115238).

Almost surely, 2^11011021212 is an apocalyptic number.

11011021212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11011021212 is an abundant number, since it is smaller than the sum of its proper divisors (14935744500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11011021212 is a wasteful number, since it uses less digits than its factorization.

11011021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9085109 (or 9085107 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11011021212 its reverse (21212011011), we get a palindrome (32223032223).

The spelling of 11011021212 in words is "eleven billion, eleven million, twenty-one thousand, two hundred twelve".