1231202111112 has 96 divisors (see below), whose sum is σ = 3413652517080. Its totient is φ = 400770892800.

The previous prime is 1231202111063. The next prime is 1231202111129. The reversal of 1231202111112 is 2111112021321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1188549122436 + 42652988676 = 1090206^2 + 206526^2 .

It is a super-3 number, since 3×1231202111112³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 628783 + ... + 1690494.

Almost surely, 2^{1231202111112} is an apocalyptic number.

1231202111112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231202111112 is an abundant number, since it is smaller than the sum of its proper divisors (2182450405968).

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

1231202111112 is a wasteful number, since it uses less digits than its factorization.

1231202111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319463 (or 2319456 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1231202111112 its reverse (2111112021321), we get a palindrome (3342314132433).

The spelling of 1231202111112 in words is "one trillion, two hundred thirty-one billion, two hundred two million, one hundred eleven thousand, one hundred twelve".