11021021221212 has 48 divisors (see below), whose sum is σ = 28748312615680. Its totient is φ = 3651135858864.

The previous prime is 11021021221127. The next prime is 11021021221247. The reversal of 11021021221212 is 21212212012011.

11021021221212 is a `hidden beast` number, since 1 + 1 + 0 + 210 + 21 + 221 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313008448 + ... + 313043655.

Almost surely, 2^{11021021221212} is an apocalyptic number.

11021021221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11021021221212 is an abundant number, since it is smaller than the sum of its proper divisors (17727291394468).

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

11021021221212 is a wasteful number, since it uses less digits than its factorization.

11021021221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626052279 (or 626052271 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11021021221212 its reverse (21212212012011), we get a palindrome (32233233233223).

The spelling of 11021021221212 in words is "eleven trillion, twenty-one billion, twenty-one million, two hundred twenty-one thousand, two hundred twelve".