1211110011312 has 20 divisors (see below), whose sum is σ = 3128700862680. Its totient is φ = 403703337088.

The previous prime is 1211110011301. The next prime is 1211110011323. The reversal of 1211110011312 is 2131100111121.

It is an interprime number because it is at equal distance from previous prime (1211110011301) and next prime (1211110011323).

It is a super-2 number, since 2×1211110011312² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211110011291 and 1211110011300.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12615729237 + ... + 12615729332.

It is an arithmetic number, because the mean of its divisors is an integer number (156435043134).

Almost surely, 2^{1211110011312} is an apocalyptic number.

1211110011312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211110011312 is an abundant number, since it is smaller than the sum of its proper divisors (1917590851368).

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

1211110011312 is a wasteful number, since it uses less digits than its factorization.

1211110011312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25231458580 (or 25231458574 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 1211110011312 its reverse (2131100111121), we get a palindrome (3342210122433).

The spelling of 1211110011312 in words is "one trillion, two hundred eleven billion, one hundred ten million, eleven thousand, three hundred twelve".