111121121121000 has 128 divisors (see below), whose sum is σ = 364945155868800. Its totient is φ = 28072704268800.

The previous prime is 111121121120969. The next prime is 111121121121107. The reversal of 111121121121000 is 121121121111.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 974689677 + ... + 974803676.

It is an arithmetic number, because the mean of its divisors is an integer number (2851134030225).

Almost surely, 2^{111121121121000} is an apocalyptic number.

111121121121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111121121121000 is an abundant number, since it is smaller than the sum of its proper divisors (253824034747800).

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

111121121121000 is a wasteful number, since it uses less digits than its factorization.

111121121121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949493396 (or 1949493382 counting only the distinct ones).

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

Adding to 111121121121000 its reverse (121121121111), we get a palindrome (111242242242111).

It can be divided in two parts, 111121 and 121121000, that added together give a palindrome (121232121).

The spelling of 111121121121000 in words is "one hundred eleven trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand".