1211422121112 has 64 divisors (see below), whose sum is σ = 3461316998400. Its totient is φ = 346109512320.

The previous prime is 1211422121101. The next prime is 1211422121177. The reversal of 1211422121112 is 2111212241121.

It is a super-3 number, since 3×1211422121112³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6149439 + ... + 6343377.

It is an arithmetic number, because the mean of its divisors is an integer number (54083078100).

Almost surely, 2^{1211422121112} is an apocalyptic number.

1211422121112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211422121112 is an abundant number, since it is smaller than the sum of its proper divisors (2249894877288).

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

1211422121112 is a wasteful number, since it uses less digits than its factorization.

1211422121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231136 (or 231132 counting only the distinct ones).

The product of its digits is 128, while the sum is 21.

Adding to 1211422121112 its reverse (2111212241121), we get a palindrome (3322634362233).

The spelling of 1211422121112 in words is "one trillion, two hundred eleven billion, four hundred twenty-two million, one hundred twenty-one thousand, one hundred twelve".