11101221312 has 56 divisors (see below), whose sum is σ = 29559144336. Its totient is φ = 3676827648.

The previous prime is 11101221311. The next prime is 11101221349. The reversal of 11101221312 is 21312210111.

It is a super-2 number, since 2×11101221312² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11101221291 and 11101221300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101221311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153993 + ... + 214280.

Almost surely, 2^11101221312 is an apocalyptic number.

11101221312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11101221312 is an abundant number, since it is smaller than the sum of its proper divisors (18457923024).

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

11101221312 is a wasteful number, since it uses less digits than its factorization.

11101221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368445 (or 368435 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11101221312 its reverse (21312210111), we get a palindrome (32413431423).

The spelling of 11101221312 in words is "eleven billion, one hundred one million, two hundred twenty-one thousand, three hundred twelve".