11221022121012 has 72 divisors (see below), whose sum is σ = 30943304421120. Its totient is φ = 3400256344320.

The previous prime is 11221022120981. The next prime is 11221022121013. The reversal of 11221022121012 is 21012122012211.

11221022121012 is a `hidden beast` number, since 1 + 1 + 221 + 0 + 221 + 210 + 12 = 666.

It is a super-2 number, since 2×11221022121012² (a number of 27 digits) contains 22 as substring.

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 (11221022121013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30317164 + ... + 30685052.

It is an arithmetic number, because the mean of its divisors is an integer number (429768116960).

Almost surely, 2^{11221022121012} is an apocalyptic number.

11221022121012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11221022121012 is an abundant number, since it is smaller than the sum of its proper divisors (19722282300108).

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

11221022121012 is a wasteful number, since it uses less digits than its factorization.

11221022121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444933 (or 444928 counting only the distinct ones).

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

Adding to 11221022121012 its reverse (21012122012211), we get a palindrome (32233144133223).

It can be divided in two parts, 112210 and 22121012, that added together give a palindrome (22233222).

The spelling of 11221022121012 in words is "eleven trillion, two hundred twenty-one billion, twenty-two million, one hundred twenty-one thousand, twelve".