1211103131412 has 24 divisors (see below), whose sum is σ = 2825955387136. Its totient is φ = 403694175168.

The previous prime is 1211103131411. The next prime is 1211103131431. The reversal of 1211103131412 is 2141313011121.

It is a happy number.

It is a super-2 number, since 2×1211103131412² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211103131411) 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, 96868 + ... + 1559355.

Almost surely, 2^{1211103131412} is an apocalyptic number.

1211103131412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211103131412 is an abundant number, since it is smaller than the sum of its proper divisors (1614852255724).

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

1211103131412 is a wasteful number, since it uses less digits than its factorization.

1211103131412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717167 (or 1717165 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 1211103131412 its reverse (2141313011121), we get a palindrome (3352416142533).

The spelling of 1211103131412 in words is "one trillion, two hundred eleven billion, one hundred three million, one hundred thirty-one thousand, four hundred twelve".