1212111131110 has 128 divisors (see below), whose sum is σ = 2545767843840. Its totient is φ = 410871398400.

The previous prime is 1212111131089. The next prime is 1212111131111. The reversal of 1212111131110 is 111311112121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212111131111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 65748454 + ... + 65766886.

It is an arithmetic number, because the mean of its divisors is an integer number (19888811280).

Almost surely, 2^{1212111131110} is an apocalyptic number.

1212111131110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212111131110 is an abundant number, since it is smaller than the sum of its proper divisors (1333656712730).

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

1212111131110 is a wasteful number, since it uses less digits than its factorization.

1212111131110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18974.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 1212111131110 its reverse (111311112121), we get a palindrome (1323422243231).

The spelling of 1212111131110 in words is "one trillion, two hundred twelve billion, one hundred eleven million, one hundred thirty-one thousand, one hundred ten".