11211022021212 has 144 divisors (see below), whose sum is σ = 31507358168832. Its totient is φ = 3337847377920.

The previous prime is 11211022021211. The next prime is 11211022021231. The reversal of 11211022021212 is 21212022011211.

11211022021212 is a `hidden beast` number, since 1 + 1 + 211 + 0 + 220 + 21 + 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 not an unprimeable number, because it can be changed into a prime (11211022021211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 125841388 + ... + 125930444.

Almost surely, 2^{11211022021212} is an apocalyptic number.

11211022021212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11211022021212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15753679084416).

11211022021212 is an abundant number, since it is smaller than the sum of its proper divisors (20296336147620).

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

11211022021212 is a wasteful number, since it uses less digits than its factorization.

11211022021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97788 (or 97783 counting only the distinct ones).

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

Adding to 11211022021212 its reverse (21212022011211), we get a palindrome (32423044032423).

The spelling of 11211022021212 in words is "eleven trillion, two hundred eleven billion, twenty-two million, twenty-one thousand, two hundred twelve".