11112121101210 has 48 divisors (see below), whose sum is σ = 27409357686816. Its totient is φ = 2883144923712.

The previous prime is 11112121101199. The next prime is 11112121101223. The reversal of 11112121101210 is 1210112121111.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11112121101210.

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, 135241632 + ... + 135323771.

It is an arithmetic number, because the mean of its divisors is an integer number (571028285142).

Almost surely, 2^{11112121101210} is an apocalyptic number.

11112121101210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11112121101210 is an abundant number, since it is smaller than the sum of its proper divisors (16297236585606).

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

11112121101210 is a wasteful number, since it uses less digits than its factorization.

11112121101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270565487 (or 270565450 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 11112121101210 its reverse (1210112121111), we get a palindrome (12322233222321).

The spelling of 11112121101210 in words is "eleven trillion, one hundred twelve billion, one hundred twenty-one million, one hundred one thousand, two hundred ten".